UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

Commission file number 1-8703

WESTERN DIGITAL CORPORATION

(Exact Name of Registrant as Specified in Its Charter)

Registrant’s telephone number, including area code: (949) 672-7000

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

      Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes x     No o

      Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.     o

      Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2).     Yes x     No o

      Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes o     No x

      The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant on December 31, 2004, the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $2.2 billion.

      As of the close of business on August 26, 2005, 216.6 million shares of common stock, par value $.01 per share, were outstanding.

Documents Incorporated by Reference

      Part III incorporates by reference certain information from the registrant’s definitive proxy statement (the “Proxy Statement”) for the 2005 Annual Meeting of Shareholders, which will be filed with the Securities and Exchange Commission within 120 days after the close of the 2005 fiscal year. Except with respect to information specifically incorporated by reference in this Form 10-K, the Proxy Statement is not deemed to be filed as part hereof.

WESTERN DIGITAL CORPORATION

INDEX TO ANNUAL REPORT ON FORM 10-K

For the Fiscal Year Ended July 1, 2005

      Typically, the Company’s fiscal year ends on the Friday nearest to June 30 and consists of 52 weeks. However, approximately every six years, the Company reports a 53-week fiscal year to align its fiscal quarters with calendar quarters by adding a week to its fourth fiscal quarter. The 2005 and 2003 fiscal years, which ended on July 1, 2005 and June 27, 2003, respectively, consisted of 52 weeks each. Fiscal year 2004, which ended on July 2, 2004, was a 53-week year.

      Unless otherwise indicated, references herein to specific years and quarters are to the Company’s fiscal years and fiscal quarters, and references to financial information are on a consolidated basis.

      The Company is a Delaware corporation that operates as the parent company of its hard disk drive business, Western Digital Technologies, Inc., which was formed in 1970.

      The Company’s principal executive offices are located at 20511 Lake Forest Drive, Lake Forest, California 92630. The Company’s telephone number is (949) 672-7000 and its web site is http://www.westerndigital.com. The information on the Company’s web site is not incorporated in this report.

      Western Digital®, the Western Digital logo, WD Caviar®, WD Raptor®, WD Passport® and WD Scorpio^tm are trademarks of Western Digital Technologies, Inc. and/or its affiliates. All other trademarks mentioned are the property of their respective owners.

PART I

General

      Western Digital Corporation (the “Company” or “Western Digital” or “WD”) designs, develops, manufactures and sells hard disk drives. A hard disk drive is a device that stores data on one or more rotating magnetic disks to allow fast access to data. Hard disk drives are one of the key components found in most computers and data storage subsystems.

      The Company’s hard disk drives are used in desktop personal computers (“PCs”), notebook computers, enterprise applications such as servers, workstations, network attached storage and storage area networks, and in consumer electronics (“CE”) products such as personal/digital video recorders (“DVRs”) and satellite and cable set-top boxes (“STBs”). In addition, the Company’s hard disk drives are used in external hard disk drive products that feature high speed buses such as 1394/ FireWire/iLink^tm, Universal Serial Bus (“USB”) and Ethernet.

      Hard disk drives provide non-volatile data storage, which means that the data is not lost when power is no longer applied to the device. The Company’s hard disk drive products currently include 3.5-inch and 2.5-inch form factor drives. The 3.5-inch form factor drives have capacities ranging from 40 gigabytes (“GB”) to 400 GB, nominal rotation speeds of 5400, 7200 and 10,000 revolutions per minute (“RPM”), and offer interfaces including Enhanced Integrated Drive Electronics (“EIDE”) and Serial Advanced Technology Attachment (“SATA”). The 2.5-inch form factor drives have capacities ranging from 40 GB to 80 GB, nominal rotation speed of 5400 RPMs, and offer the EIDE interface. In addition, the Company has plans to enter the 1.0-inch hard disk drive market in the future. The Company anticipates that 1.0 inch hard disk drive products could be used in a variety of handheld consumer devices such as MP3 players, cameras, and cell phones.

      The Company sells its products worldwide to original equipment manufacturers (“OEMs”) for inclusion in computer systems or subsystems, and to distributors, resellers and retailers. The Company’s hard disk drive products are currently manufactured in Malaysia and Thailand. For geographical financial data, see the Company’s Consolidated Financial Statements and Note 9 thereto included in this Annual Report on Form 10-K.

Industry

      Western Digital’s primary business focus is the design, development, manufacture and sale of hard disk drives to the desktop PC, mobile, enterprise and consumer electronics markets.

      The Company believes based on industry data that historically the sale of personal computers and hard disk drives were similar in volume, however, during the last five years, the Company believes the growth in hard disk drive sales has outpaced growth in personal computer sales. For example, based on industry data the Company believes in calendar 2001 there were approximately 34% more hard disk drives sold in the market than personal computers. In contrast, in calendar 2004 there were approximately 61% more hard disk drives sold in the market than personal computers. The Company believes that this accelerating growth of hard disk drive sales is driven primarily by the following:

      Desktop PC Market.

      Desktop PCs are used in a number of environments, ranging from homes to businesses and multi-user networks. Software applications are used on desktop PCs for word processing, spreadsheet, desktop publishing, database management, multimedia, entertainment and other related applications. Hard disk drives store both software applications

and the data used by these software applications. The Company believes that the demand for hard disk drives in the PC market has grown in part due to:

      In addition, the Company believes the rate of PC unit growth is affected by several factors, including maturing PC markets in North America and Western Europe, an increase in first-time buyers of PCs in Eastern Europe and Asia, and the lengthening of PC replacement cycles. For an additional discussion of changes in the PC market, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

      Mobile Computing Market.

      The Company expects the mobile computing market, which is primarily notebook computers, to grow faster than the desktop PC or enterprise markets in the next three years. The Company entered this market in October 2004 with the introduction of its WD Scorpio^tm product, a 2.5-inch form factor hard disk drive.

      The Company believes that the demand for mobile drives has grown from approximately 16% of the overall hard disk drive market in 2002 to 24% of the overall hard disk drive market in 2004. The Company believes that this growth trend will continue as people continue to buy notebook computers in increasing numbers.

      Enterprise Market.

      The enterprise market for hard disk drives focuses on customers that make workstations, servers, network attached storage, storage area networks, and other computing systems or subsystems. This market has been traditionally served by hard disk drives that use the small-computer-systems-interface (“SCSI”) standard. Recently, however, SCSI hard disk drives are being supplemented by SATA hard disk drives in certain enterprise storage applications. SATA is an interface technology supported by industry standards. In most applications, SATA hard disk drives cost less than SCSI while maintaining reliability, scalability and performance necessary for many mainstream enterprise applications.

      The Company believes that the use of SATA hard disk drives in the enterprise hard disk drive market will continue to increase. For example, during the past few years a new disk-based back-up application has emerged with high-capacity SATA hard disk drives augmenting SCSI, tape and optical media. This new trend, popularly referred to as “near-line” storage, has created a growth market due to the ability of hard disk drives to back-up or access data more quickly than tape or optical solutions, and to quickly retrieve critical back-up or near-line data. The increasing use of hard disk drives in near-line storage applications is also being enhanced by the availability of SATA hard disk drive solutions, which are more cost competitive as compared to SCSI hard disk drives.

      In addition, SATA drives are also being used in unique clustering applications for databases, scientific computing, web caching and electronic mail. These applications have become an important market for large capacity SATA hard disk drives and the Company believes that this market will continue to consume a growing portion of the Company’s highest capacity hard disk drives in the next three years.

      Consumer Electronics Market.

      The use of hard disk drives in consumer electronic products has been a new growth area in recent years. Currently, the three largest uses for hard disk drives in this area are as follows:

      Since 1999, hard disk drive-based recorders of audio and video content have been available for use in home entertainment systems. Commonly called personal video recorders (“PVRs”) or digital video recorders (“DVRs”), these

consumer devices offer the end-user enhanced features such as pausing live television, simplifying the process of recording and cataloging recorded television programs and quickly forwarding or returning to any section of a recorded television program. In addition, hard disk drives are being increasingly incorporated into DVD recorders to allow for PVR/ DVR functionality and faster recording of content onto removable DVDs. In general, the market for these products favor large capacity hard disk drives, and there is a growing market for these products in Japan and North America, and strong interest in Europe and the rest of Asia Pacific. The Company believes that growth in this market may increase the demand for higher capacity hard disk drives.

      The Company has plans to enter the 1.0-inch hard disk drive market in the future, and anticipates offering 1.0-inch hard disk drives for use in CE products to store and play audio content. In addition, the Company believes that there may be opportunities for growth in sales of 1.0-inch hard disk drives for use in future versions of cameras and cell phones. The strong growth in demand for hard disk drive storage in CE products to store and play audio content increased significantly in the third calendar quarter of 2004. The Company believes based on industry data that a total over 2 million hard disk drive based MP3 players were sold in the market for the third calendar quarter of 2004. The majority of hard disk drives used in MP3 players are either 1.0-inch or 1.8-inch products. Sales of hard disk drive based MP3 players featuring 1.0-inch or 1.8-inch products continued with strong growth into calendar 2005.

      For further discussion of the audio-video market, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

      Hard disk drives continue to be used in game consoles, although game console sales have fallen over the last four years. Although the Company has provided hard disk drives for game consoles in the past, the overall market growth for hard disk drives in game consoles continues to be challenged.

      For an additional discussion of the video game market, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

      The External Hard Disk Drive Market.

      Most new desktop PC systems are equipped with high-speed external interfaces, such as 1394/ FireWire/i.Link, USB or Ethernet. As a result, end users are able to supplement the storage space of their PC systems with the use of external hard disk drive products that connect via these high-speed interfaces. External hard disk drive products are commonly used for storing additional programs or multimedia content, or for backing up internal hard disk drives. While the external hard disk drive market continues to be a small part of the overall hard disk drive market, the Company believes that sales of external hard disk drives will continue to grow. In general, external storage may often be the easiest, quickest or only way of adding additional storage capacity to either a notebook or desktop computer. In addition, the Company believes that in the future there is opportunity for acceptance of external storage in CE products as a way or expanding storage in these devices.

      Other Market Opportunities.

      The Company continuously evaluates opportunities to apply its knowledge of data storage technology beyond current markets for hard disk drives. New business opportunities are evaluated for their direct impact on the Company’s ability to increase the sale of hard disk drives. The Company monitors the development of new markets related to data or content storage and may, from time to time, offer new products or services to address appropriate new form factors, interfaces or markets. Conversely, depending on the development of such markets and the Company’s ability to achieve its goals, the Company may, from time to time, withdraw from certain markets.

Products

      The Company offers a broad line of hard disk drives designed for various markets. Western Digital’s hard disk drives are marketed under the WD Caviar®, WD Raptor® and WD Scorpio^tm brand names. These hard disk drives service the desktop, enterprise, external hard disk drive and consumer electronics markets, and can be found in products including but not limited to advanced performance desktop and workstations, gaming consoles, video surveillance equipment, networking products, enterprise storage and notebook computers.

      Consumer Electronics Products. The Company offers design capabilities and hard disk drive technologies for consumer applications. The Company currently offers hard disk drive products designed for use in digital video recording

products such as personal video recorders (PVRs), digital video recorders (DVRs), and satellite and cable set-top boxes (STBs). These products are designed to meet the unique requirements of this specialized storage-enabled market and the hard disk drives deliver the characteristics CE manufacturers seek most — quiet operation, low temperature and power consumption specifications, high reliability and optimized streaming capabilities. The Company also offers products for the video game console market. In addition, the Company has plans to enter the 1.0-inch hard disk drive market in the future. The Company anticipates that 1.0-inch hard disk drive products could be used in a variety of handheld consumer devices such as MP3 players, cameras and cell phones.

      Mobile Hard Disk Drive Products. Hard disk drives used in mobile products typically include 2.5-inch form factor drives for notebook computers. Although the desktop PC market accounts for a majority of hard disk drive sales, unit shipments of hard disk drives for notebook computers are increasing. In 2005, the Company introduced its WD Scorpio hard disk drive family consisting of 2.5-inch form factor products with capacities ranging from 40 GB to 80 GB and a nominal rotation speed of 5400 RPM. These products utilize the EIDE interface.

      Desktop PC Hard Disk Drive Products. WD hard disk drives designed for the desktop PC market currently consist of 3.5-inch form factor products with capacities ranging from 40 GB to 400 GB and nominal rotation speeds of 7200 RPM. These products utilize either the EIDE or SATA interfaces, providing high performance while retaining ease of use and overall low cost of connection. The type of EIDE interface currently used in the Company’s hard disk drives is ATA/100, which signifies a burst data transfer rate of 100 megabytes per second, which is the maximum specified data transition that can be sustained under ideal conditions. The SATA interface available in certain of the Company’s hard disk drives enable transfer rates of up to 300 megabytes per second.

      Enterprise Hard Disk Drive Products. Western Digital currently offers multiple products to address enterprise market needs, including the WD Raptor and Caviar RAID Edition (RE) hard disk drive lines. The WD Raptor line is a 10,000 RPM enterprise-class drive with the SATA interface for enterprise applications requiring high performance and high reliability. The WD Caviar RE hard disk drive is a 7200 RPM drive with capacities ranging from 120 GB to 400 GB. The WD Caviar RE hard disk drive includes both SATA and EIDE interfaces and has enhanced reliability features and ratings when contrasted to our desktop products. Both WD Raptor and WD Caviar RE drives may be used in, but not limited to, applications such as databases, e-commerce and super computing in life science, oil and gas and similar industries, business records management, e-mail, file serving, web serving, near-line storage, medical records, engineering data management, video broadcasting and video security.

      External Hard Disk Drive Products. Western Digital also sells a line of external hard disk drive products and related adapters that are designed to accommodate external storage interfaces including 1394/ FireWire/i.Link, USB and Ethernet. In general, these interfaces provide a high-speed interface that can be used to add additional external, portable storage capacity to desktop and laptop computers. Most new computers sold today include one or multiple of these high speed external interfaces, thereby supporting the ability to quickly add external hard disk drive storage. One of Western Digital’s external hard disk drive products now shipping is the WD Passport, a 80GB 5400 RPM portable 2.5-inch hard disk drive.

Technology and Product Development

      Hard disk drives are used to record, store and retrieve digital data. Performance attributes of hard disk drives, such as their ability to access and transmit data and storage capacity, are currently better than removable or floppy disks, optical hard disk drives and tapes, and they are more cost effective than semiconductor technology. The primary measures of hard disk drive performance include:

      All of the Company’s hard disk drive products employ similar technology. The main components of the hard disk drive are the head disk assembly and the printed circuit board. The head disk assembly includes the head, media (disks), head positioning mechanism (actuator) and spindle motor. These components are contained in a hard base plate protective package in a contamination-controlled environment. The printed circuit board includes both standard and custom integrated circuits, an interface connector to the host computer and a power connector.

      The head disk assembly is comprised of one or more disks positioned around a spindle hub that rotates the disks by a spindle motor. Disks are made of a smooth substrate to which a thin coating of magnetic materials is applied. Each disk has a head suspended directly above it, which can read data from or write data to the spinning disk.

      The integrated circuits on the printed circuit board typically include a drive interface and a controller. The drive interface receives instructions from the computer, while the controller directs the flow of data to or from the disks and controls the heads. The location of data on each disk is logically maintained in concentric tracks that are divided into sectors. The computer sends instructions to the controller to read data from or write data to the disks based on logical track and sector locations. Guided by instructions from the controller, the head stack assembly is pivoted and swung across the disk by a head actuator or motor until it reaches the selected track of a disk, where the data is recorded or retrieved.

      Industry standard interfaces are utilized to allow the hard disk drive to communicate with the computer. Currently, the primary interface for desktop PCs is EIDE, and the primary interface for enterprise systems is SCSI. As computer performance continues to improve, the hard disk drive will need to deliver information faster than these interfaces can handle. The Company believes that the desktop PC industry plans to transition to higher speed interfaces, such as SATA, to handle the higher data transfer rates. The Company currently offers its WD Caviar products, 7200 RPM drives with the SATA interface and featuring capacities as large as 400 GB. These products are designed for the PC, workstation, server, and external storage markets. The Company believes that SATA is also becoming a more popular interface in the enterprise market. Western Digital currently offers its WD Raptor hard disk drive, a 10,000 RPM enterprise-class drive with the SATA interface, and the WD Caviar RE2 and RE hard disk drives, 7200 RPM drives manufactured to enterprise-class standards and available with a SATA interface.

      Storage capacity of the hard disk drive, as manufactured by Western Digital, is determined by the number of disks and each disk’s areal density, which is a measure of the amount of data that can be stored on the recording surface of the disk. The higher the areal density, the more information can be stored on a single platter. As the areal density increases, fewer disks and/or heads are required to achieve a given drive capacity, thus reducing product costs through reduced component requirements.

      Head technology is one of the variables affecting areal density. Historically, there have been rapid technological changes resulting in several generations of head technology in a relatively short period of time. However, in recent years the time has lengthened between changes in generations of head technology. Currently, the desktop hard disk drive industry uses giant magnetoresistive head technology, which allows significantly higher storage capacities than the previously utilized thin-film head technology. All of the Company’s hard disk drive product offerings currently employ giant magnetoresistive head technology. In addition, significant development efforts have been undertaken across the industry to implement perpendicular recording technology. The Company anticipates using perpendicular recording heads in certain products in the future.

      The Western Digital product line generally leverages a common platform for various products within product families with different capacities to serve the differing market needs. This platform strategy results in commonality of components across different products within product families and, in some cases, across product families, which reduces

exposure to changes in demand, facilitates inventory management and allows the Company to achieve lower costs through economies of scale purchasing. This platform strategy also enables computer manufacturer customers to leverage their qualification efforts onto successive product models. The Company expects to continue to utilize this platform strategy as it continues to develop products for the mobile market and the emerging markets for hard disk drives specifically designed for handheld applications, such as digital music players and audio-video applications, such as digital video recording devices.

      In addition to the development of the overall hard disk drive, WD also spends considerable effort and expense in the development of WD head technology used in the majority of its hard disk drive products. In general, the design and manufacturing of WD heads consists of engineering and fabricating a read element for reading data from a disk, a write element for writing data to a disk, and slider. The slider functions similar to an airplane wing and allows the read and write elements to fly over the surface of the disk drive and to land, on either the disk substrate or a special ramp, when power is not applied to the hard disk drive.

      For an additional discussion of technological innovations, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Sales and Distribution

      The Company sells its products globally to Original Equipment Manufacturers, or “OEMs,” distributors and retailers. OEMs purchase the Company’s hard disk drives and assemble them into the computer or other consumer electronic systems they build. Distributors typically sell the Company’s hard disk drives to small computer manufacturers, dealers, systems integrators and other resellers. Retailers typically sell the Company’s hard disk drive products directly to end-users.

      Original Equipment Manufacturers. Sales to OEMs accounted for 58%, 51% and 52% of the Company’s revenue in 2005, 2004 and 2003, respectively. During 2005, the Company’s major OEM customers included Dell and Hewlett-Packard. During 2005 and 2004, sales to Dell accounted for 16% and 14%, respectively of the Company’s revenue. During 2003, sales to Dell and Hewlett-Packard accounted for 20% and 13% of revenue, respectively. The Company believes that its success depends on its ability to maintain and improve its strong relationships with the leading OEMs.

      OEMs evaluate and select their hard disk drive suppliers based on a number of factors, including overall quality and reliability, storage capacities, performance characteristics, price, service and support, ease of doing business, and the supplier’s long-term financial stability. They typically seek to qualify two or more providers for each generation of hard disk drives, and once an OEM has chosen its qualified hard disk drive vendors for a given product, it generally will purchase hard disk drives from those vendors for the life of that product. To achieve success with OEMs qualifications, a hard disk drive supplier must consistently offer hard disk drives featuring leading technology, quality, reliability and acceptable capacity per disk. Suppliers must quickly achieve volume production of each new generation of high quality and reliable hard disk drives. To quickly achieve high volume production, a hard disk drive supplier must have access to flexible, high-capacity, high-quality manufacturing capabilities.

      Many of the Company’s OEM customers utilize just-in-time inventory management processes or supply chain business models that combine “build-to-order” (in which the OEM does not build until there is a firm order) and “contract manufacturing” (in which the OEM contracts assembly work to a contract manufacturer who purchases components and assembles the computer based on the OEM’s instructions). For certain OEMs, the Company maintains a base stock of finished goods inventory in facilities located near or adjacent to the OEM’s operations.

      For an additional discussion of the need to adapt to customers’ business models and maintain customer satisfaction, refer to Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

      Distributors. The Company uses a select group of distributors to sell its products to small computer manufacturers, resellers, dealers and systems integrators. Distributors accounted for approximately 36%, 42% and 40% of the Company’s revenue for 2005, 2004 and 2003, respectively. Distributors generally enter into non-exclusive agreements for specific territories with the Company for purchase and redistribution of product. The Company grants its distributors limited price protection rights.

      Retailers. The Company sells its retail-packaged products directly to a select group of major retailers such as computer superstores, warehouse clubs and computer electronics stores, and authorizes sales through distributors to smaller retailers. Retailers accounted for approximately 6%, 7% and 8% of the Company’s revenue for each of 2005, 2004 and 2003, respectively. The Company’s current retail customer base is primarily in the United States, Canada and Europe. The retail channel complements the Company’s other sales channels while helping to build brand awareness for the Company and its products. Retailers supply the aftermarket “upgrade” and data back-up sectors in which end-users purchase and install products to upgrade their computers and externally store their data for back-up purposes. The Company grants its retailers price protection and limited rights to return product on an inventory rotation basis. The Company also sells its retail-packaged products through the Internet, at its web site.

      The Company maintains sales offices in selected parts of the world including the major geographies of the Americas, Asia Pacific, Europe and the Middle East. Field application engineering is provided to strategic computer manufacturer accounts, and localized end-user technical support services are provided within the United States, Canada, Europe and Asia. The Company’s localized end-user technical support is currently supplied by employees and third party providers through telephone support, and via the Company’s web site.

      The Company’s international sales, which include sales to foreign subsidiaries of U.S. companies but do not include sales to U.S. subsidiaries of foreign companies, represented 65%, 63% and 59% of the Company’s revenue for 2005, 2004 and 2003, respectively. Sales to international customers may be subject to certain risks not normally encountered in domestic operations, including exposure to tariffs and various trade regulations. See Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

      For additional information concerning revenue recognition, sales by geographic region and significant customer information, see Notes 1 and 9 of the Notes to Consolidated Financial Statements.

      The Company’s marketing and advertising functions are performed both internally and through outside firms. Advertising, worldwide packaging and marketing materials are targeted to various reseller and end-user categories. Western Digital utilizes both consumer media and, to a lesser extent, trade publications. The Company has programs under which qualifying distributors and retailers are reimbursed for certain marketing expenditures. Western Digital also maintains customer relationships by communicating with its resellers and providing end-users with information and support through its web site.

Competition

      The Company competes primarily with manufacturers of hard disk drives for desktop PC, mobile, enterprise and CE products. The Company’s competitors in the hard disk drive market include Seagate Technology, Maxtor Corporation, Fujitsu Limited, Hitachi Global Storage Technologies, Samsung Electronics Incorporated and Toshiba Corporation.

      The hard disk drive industry is intensely competitive, with hard disk drive suppliers competing for sales to a limited number of major customers. Hard disk drives manufactured by different competitors are highly substitutable due to the industry mandate of technical form, fit and function standards. Hard disk drive manufacturers compete on the basis of product quality and reliability, storage capacity, unit price, product performance, production volume capabilities, delivery capability, leadership in time-to-market, time-to-volume and time-to-quality, service and support, and ease of doing business. The relative importance of these factors varies between different customer and market segments. The Company believes that it is generally competitive in all of these factors.

      The Company believes that there are no substantial barriers for existing competitors to offer competing products. Therefore, the Company believes that it cannot differentiate its hard disk drive products solely on attributes such as storage capacity, buffer size or time-to-market. Accordingly, the Company differentiates itself by focusing on high product quality and reliability, and designing and incorporating into its hard disk drives desirable product performance attributes. Such performance attributes focus on seek times, data transfer rates, intelligent caching, failure prediction, remote diagnostics, acoustics and data recovery. In addition, the Company emphasizes non-product related attributes, including rapid response with its customers. Rapid response requires accelerated design cycles, customer delivery, production flexibility and timely service and support, which contribute to customer satisfaction. The Company also relies on the strength of the Western Digital brand name with value-added resellers and solution providers to whom the

Company sells its hard disk drive products directly and indirectly. The Company believes that trust in a manufacturer’s reputation and the establishment of strategic relationships have become important factors in the selection of a hard disk drive, particularly in a rapidly changing technology environment.

      Advances in magnetic, optical or other data storage technologies could result in competitive products that have better performance or lower cost per unit of capacity than the Company’s hard disk drive products. High-speed semiconductor memory could compete with the Company’s hard disk drive products in the future. Semiconductor memory is much faster than magnetic hard disk drives, but currently is not competitive from a cost standpoint. Flash memory, a non-volatile semiconductor memory, is currently much more costly and, while it has higher “read” performance attributes than hard disk drives, it has lower “write” performance attributes. Flash memory could become competitive in the near future for applications requiring less storage capacity than that provided by hard disk drives.

      For an additional discussion of competition, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Service and Warranty

      Western Digital generally warrants its newly manufactured hard disk drives against defects in materials and workmanship for periods of from one to five years from the date of sale depending on the type of product. The Company’s warranty obligation is generally limited to repair or replacement of the hard disk drive. The Company has engaged third parties in Australia, Brazil, Canada, China, Germany, Hungary, India, Korea, Russia, Singapore, Thailand and the United Arab Emirates to provide various levels of testing, processing and/or recertification of returned hard disk drives for the Company’s customers. In addition, the Company processes, tests and recertifies returned hard disk drives at its own facility in the United States.

Manufacturing

      Western Digital believes that it has significant know-how, unique product manufacturing process, and human resources to continue to be successful and have the ability to grow, as necessary, its manufacturing operations. To be competitive, Western Digital must manufacture high quality hard disk drives with industry leading time-to-volume production at competitive unit costs. The Company strives to maintain manufacturing flexibility, high manufacturing yields, and reliable products, while insisting that its suppliers provide high-quality components at competitive prices. The critical elements of Western Digital’s hard disk drive production are high volume, low cost assembly and testing, and establishment and maintenance of key supplier relationships. By establishing close relationships with its strategic component suppliers, the Company believes it is able to access best-of-class manufacturing quality. In addition, the Company believes that its sourcing strategy currently enables it to have the business flexibility needed to select the highest quality low cost of ownership suppliers as product designs and technologies evolve.

      Hard disk drive manufacturing is a complex process involving the assembly of precision components with narrow tolerances and thorough testing. The assembly process occurs in a “clean room” environment that demands skill in process engineering and efficient utilization of the “clean room” layout in order to reduce the high operating costs of this manufacturing environment. The Company’s clean room manufacturing process consists of modular production units, each of which contains a number of work cells.

      The Company manufactures hard disk drives in Malaysia and Thailand. The Company continually evaluates its manufacturing processes in an effort to increase productivity, sustain and improve quality and decrease manufacturing costs. For example, during 2002, in response to an increase in demand and in order to capitalize on the local supplier base, the Company completed the acquisition of a Thailand manufacturing facility. The Company continually evaluates which steps in the manufacturing process would benefit from automation and how automated manufacturing processes can improve productivity and reduce manufacturing costs.

      In July 2003, the Company purchased substantially all of the assets of Read-Rite Corporation, formerly one of the Company’s suppliers of heads, including its wafer fabrication equipment in Fremont, California and its slider fabrication facility in Bang Pa-In, Thailand. These assets are upgraded and enhanced as necessary to meet the demands of newer technologies consistent with the Company’s hard disk drive production facilities. The Company uses these facilities to

design and manufacture a substantial portion of the heads, head gimbal assemblies (“HGAs”) and head stack assemblies (“HSAs”) for use in hard disk drives it manufactures.

      For an additional discussion of manufacturing, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Research and Development

      The Company devotes substantial resources to development of new products and improvement of existing products. The Company focuses its engineering efforts on coordinating its product design and manufacturing processes in order to bring its products to market in a cost-effective and timely manner. Research and development expenses totaled $239 million, $201 million and $135 million in 2005, 2004 and 2003, respectively.

      For further discussion of product development, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Materials and Supplies

      The principal components currently used in the manufacture of the Company’s hard disk drives are magnetic heads and related HSAs, media, controllers, spindle motors and mechanical parts used in the head disk assembly. In addition to custom semiconductor devices, the Company also uses standard semiconductor components such as logic, memory and microprocessor devices obtained from other manufacturers and a wide variety of other parts, including printed circuit boards, connectors, cables, and other interconnect technology.

      The Company designs and manufactures a substantial portion of the heads required for the hard disk drives it manufactures. The Company also purchases a portion of these components from third party suppliers. During 2005, the Company bought giant magnetoresistive heads from ALPS Electric Co., Ltd. and TDK Corporation’s subsidiary, SAE Magnetics Ltd.

      The Company acquires all of the remaining components for its products from third party suppliers. The Company generally obtains multiple suppliers for each of its component requirements, however, in some instances for business reasons the Company is sole sourced. For example, during 2005, the Company’s media requirements were purchased from several outside vendors including Fuji Electric, Hoya Corp., Komag Inc. and Showa Denko KK. The Company has volume purchase agreements with Komag Inc. and Showa Denko KK under which the Company is obligated to purchase from each supplier, and each supplier is obligated to sell to the Company, certain specified media volumes in accordance with the terms in the agreements.

      Some components are currently sole-sourced. For example, some custom integrated circuit devices for certain products are currently sole-sourced from STMicroelectronics and Marvell Semiconductor, Inc. Because of their custom nature, these products require significant design-in periods and long lead times. There has been a trend in integrated circuit design toward increased integration of various separate circuits. The Company expects this trend to continue in the area of custom integrated circuits for hard disk drives.

      For an additional discussion of component supplies, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Backlog

      Historically, a substantial portion of the Company’s orders has been for shipments of hard disk drives within 30 to 60 days of the placement of the order. The Company generally negotiates pricing, order lead times, product support requirements and other terms and conditions prior to receiving a computer manufacturer’s first purchase order for a product. Customers’ purchase orders typically may be canceled with relatively short notice to the Company, with little or no cost to the customer, or modified by customers to provide for delivery at a later date. In addition, many of the Company’s sales to OEMs are made under just-in-time delivery contracts that do not generally require firm order commitments by the customer until the time of sale. Instead, the Company receives a periodic forecast of requirements from the customer, and the customer is invoiced upon shipment of the product from the just-in-time warehouse.

Therefore, backlog information as of the end of a particular period is not necessarily indicative of future levels of the Company’s revenue and profit and may not be comparable to earlier periods.

Patents, Licenses and Proprietary Information

      The Company owns numerous patents and has many patent applications in process. The Company believes that, although its patents and patent applications have considerable value, the successful manufacturing and marketing of its products depends primarily upon the technical and managerial competence of its personnel. Accordingly, the patents held and applied for do not assure the Company’s future success.

      In addition to patent protection of certain intellectual property rights, the Company considers elements of its product designs and processes to be proprietary and confidential. The Company believes that its non-patented intellectual property, particularly some of its process technology, is an important factor in its success. Western Digital relies upon non-disclosure agreements and contractual provisions and a system of internal safeguards to protect its proprietary information. Despite these safeguards, there is a risk that competitors may obtain and use such information. The laws of foreign jurisdictions in which the Company conducts business also may provide less protection for confidential information than the United States.

      The Company relies on certain technology that is licensed from other parties in order to manufacture and sell its products. The Company believes that it has adequate cross-licenses and other agreements in place in addition to its own intellectual property portfolio to compete successfully in the hard disk drive industry.

      For additional discussion of intellectual property, see Part II, Item 7, under the heading “Risk Factors That May Affect Future Results.”

Environmental Regulation

      The Company is subject to a variety of regulations in connection with its operations. It believes that it has obtained or is in the process of obtaining all necessary environmental permits for its operations.

Employees

      As of July 1, 2005, the Company employed a total of 23,161 employees worldwide. This represents an increase in headcount of approximately 33% since July 2, 2004 and an increase of approximately 101% since June 27, 2003. The increase is primarily the result of increased production in the Company’s manufacturing facilities, the Company’s expansion of its product offerings and the Company’s acquisition of Read-Rite’s assets in July 2003.

      Many of the Company’s employees are highly skilled, and the Company’s continued success depends in part upon its ability to attract and retain such employees. Accordingly, the Company offers employee benefit programs, which it believes are, in the aggregate, approximately comparable to those offered by its competitors. Despite these programs, the Company has, along with most of its competitors, experienced difficulty at times in hiring and retaining certain skilled personnel. In addition, the Company has utilized consultants and contract personnel to fill these needs until full-time employees could be recruited. The Company has never experienced a work stoppage, none of its domestic employees are represented by a labor organization, and the Company considers its employee relations to be good.

Available Information

      The Company maintains an Internet web site at http://www.westerndigital.com. The Company’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed pursuant to Sections 13(a) and 15(d) of the Securities Exchange Act of 1934, as amended, are available on the Company’s web site at http://www.westerndigital.com, free of charge, as soon as reasonably practicable after these reports are filed electronically with the Securities and Exchange Commission (the “SEC”). Any materials the Company files with the SEC are available at the SEC’s Public Reference Room at 450 Fifth Street, NW, Washington, DC 20549. Additional information about the operation of the Public Reference Room can also be obtained by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a web site at http://www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including Western Digital.

Executive Officers of the Registrant

      The names, ages and positions of all of the executive officers of the Company as of August 26, 2005 are listed below, followed by a brief account of their business experience during the past five years. Executive officers are normally appointed annually by the Board of Directors at a meeting of the directors immediately following the Annual Meeting of Shareholders. There are no family relationships among these officers nor any arrangements or understandings between any officer and any other person pursuant to which an officer was selected.

      Mr. Massengill joined the Company in 1985 and has served in various executive capacities. From October 1999 until January 2000, he served as Chief Operating Officer. Mr. Massengill served as President of the Company from January 2000 until January 2002, and he was appointed Chief Executive Officer in January 2000. He assumed the additional role of Chairman of the Board of Directors in November 2001.

      Mr. Shakeel joined the Company in 1985 and has served in various executive capacities. In February 2000, he became Executive Vice President and General Manager of Hard disk drive Solutions. He was promoted to Executive Vice President and Chief Operating Officer in April 2001, and served in that position until promoted to his current position of President in January 2002.

      Mr. Coyne joined the Company in 1983 and has served in various executive capacities. In November 2002, Mr. Coyne was promoted to Senior Vice President, Worldwide Operations. He was promoted to Executive Vice President, Worldwide Operations, in June 2005.

      Mr. Bukaty joined the Company in 1999 as Vice President, Corporate Law. Mr. Bukaty was promoted to Vice President, General Counsel and Secretary in March 2002, and to Senior Vice President in January 2004, and assumed his current position as Senior Vice President, Administration, General Counsel and Secretary in October 2004.

      Mr. Milligan joined the Company in September 2002 as Vice President, Finance. He was appointed Senior Vice President and Chief Financial Officer in January 2004. Prior to joining the Company, Mr. Milligan served in a variety of senior finance capacities at Dell between April 1997 and September 2002, including Assistant Controller, European Controller, North European Finance Director, Director of Finance for the Americas, and Controller for Dell Financial Services.

      Dr. Moghadam joined the Company in October 2000 as Vice President, Engineering and site manager of the Company’s San Jose facility. He was appointed Senior Vice President, Research and Development in November 2004.

      On August 25, 2005 the Company announced that Arif Shakeel will become chief executive officer of the Company on October 1, 2005. Mr. Shakeel will retain the title of president when he becomes CEO. Chairman Matt Massengill will relinquish the CEO title but remain actively engaged as executive chairman of the board and in relationships with shareholders and other strategic constituents.

Item 2. Properties

      The Company’s corporate headquarters are located in Lake Forest, California. The Lake Forest facilities consist of an aggregate of 256,789 square feet of leased space and house the Company’s management, research and development, administrative and sales personnel. In addition, the Company leases facilities in Fremont, California, consisting of approximately 213,067 square feet, that are used for head wafer fabrication, research and development and warehousing. The Company also leases approximately 234,693 square feet in San Jose, California primarily for research and development activities. In addition, the Company leases one facility in Irvine, California, which consists of 59,213 square

feet and is used as a hard disk drive return and refurbishing center. The Company also leases office space in various other locations throughout the world primarily for sales and technical support.

      Western Digital owns a 633,077 square foot manufacturing facility in Kuala Lumpur, Malaysia. The Company also owns a manufacturing facility in Pathumthani, Thailand, consisting of approximately 232,500 square feet. In addition, in July 2003 the Company acquired a facility in Bang Pa-In, Thailand, consisting of three buildings with an aggregate of 433,744 square feet, which is used for slider fabrication, the assembly of HGAs and HSAs, and research and development.

      The Company believes its present facilities are adequate for its current needs, although the process of upgrading its facilities to meet technological and market requirements is expected to continue. New manufacturing facilities generally can be developed and become operational within approximately nine to eighteen months should the Company require such additional facilities.

Item 3. Legal Proceedings

      See Part II, Item 8, Notes to Consolidated Financial Statements, Note 6.

Item 4. Submission of Matters to a Vote of Security Holders

      No matters were submitted to a vote of security holders during the fourth quarter of 2005.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities

      Western Digital’s common stock is listed on the New York Stock Exchange, Inc. (“NYSE”) under the symbol “WDC”. The approximate number of holders of record of common stock of the Company as of August 26, 2005 was 2,673.

      The Company has not paid any cash dividends on its common stock and does not intend to pay any cash dividends on common stock in the foreseeable future. The Company’s $125 million credit facility prohibits the Company from paying cash dividends on its common stock.

      The high and low sales prices of the Company’s common stock, as reported by the NYSE, for each quarter of 2005 and 2004 are as follows:

      The following table provides information about repurchases by the Company of its common stock during the quarter ended July 1, 2005:

Item 6. Selected Financial Data

Financial Highlights

      This selected consolidated financial data should be read together with the Consolidated Financial Statements and related Notes contained in this report and in the subsequent reports filed with the SEC, as well as the section of this report and the other reports entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Forward-Looking Statements

      This report contains forward-looking statements within the meaning of the federal securities laws. The statements that are not purely historical should be considered forward-looking statements. Often they can be identified by the use of forward-looking words, such as “may,” “will,” “could,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “continue,” “potential,” “plan,” “forecasts,” and the like. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions. Examples of forward-looking statements include, but are not limited to, statements concerning: the growth of unit sales of desktop PCs; growth in demand for and unit shipments of hard disk drives in the desktop PC, CE (including multi-media applications, PVR and DVR), and mobile markets; growth of revenue from sales of hard disk drives in the desktop PC market; increase in sales of notebook systems and the Company’s on-going volume ramp of its Scorpio 2.5-inch hard disk drives; increase in the demand for desktop PC hard disk drives in emerging economies such as India and China; the Company’s expansion into the CE market; the growth rate of the mobile computing market relative to the desktop PC market; expansion of the SATA interface in desktop PCs and growth of SATA interfaces in enterprise hard disk drives; increase in use of hard disk drives in near line storage applications; growth of the market for enterprise and other non-desktop PC applications of 3.5-inch form factor hard disk drives; growth of the external hard disk drive market and acceptance of external storage in consumer electronics products; increase in demand for higher capacity hard disk drives; the Company’s planned entrance into 1.0-inch hard disk drive market and use of hard disk drives in consumer products; the Company’s planned use of perpendicular recording in certain products; trends in the area of custom integrated circuits for hard disk drives; increase in areal density (the measure of storage per disk) and decrease in areal density growth rate; the Company’s expectations regarding traditional seasonal demand trends for the hard disk drive industry in the September 2005 quarter; the Company’s expectations regarding its stock repurchase program; the Company’s expectations regarding capital expenditures for 2006 and operating expenses for the September 2005 quarter; the Company’s beliefs regarding the sufficiency of its cash, cash equivalents and short-term investments to meet its working capital needs; the Company’s expectations regarding its utilization of its liquidity and cash flows to improve the efficiency and capability of its existing hard disk drive and head manufacturing operations; and the Company’s expectations regarding the impact of new accounting standards.

      Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements. Readers are urged to carefully review the disclosures made by the Company concerning risks and other factors that may affect the Company’s business and operating results, including those made in this report under the caption “Risk Factors That May Affect Future Results” as well as the Company’s other reports filed with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Company undertakes no obligation to publish revised forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

      Unless otherwise indicated, references herein to specific years and quarters are to the Company’s fiscal years and fiscal quarters.

The Company

      Western Digital Corporation designs, develops, manufactures and sells hard disk drives. A hard disk drive is a device that stores data on one or more rotating magnetic disks to allow fast access to data. Hard disk drives are one of the key components found in most computers and data storage subsystems.

      The Company’s hard disk drives are used in desktop personal computers (“PCs”), notebook computers, enterprise applications such as servers, workstations, network attached storage and storage area networks, and in consumer electronics (“CE”) products such as personal/digital video recorders (“DVRs”) and satellite and cable set-top boxes (“STBs”). In addition, the Company’s hard disk drives are used in external hard disk drive products that feature high speed buses such as 1394/ FireWire/iLink^tm, Universal Serial Bus (“USB”) and Ethernet.

      Hard disk drives provide non-volatile data storage, which means that the data is not lost when power is no longer applied to the device. The Company’s hard disk drive products currently include 3.5-inch and 2.5-inch form factor drives. The 3.5-inch form factor drives have capacities ranging from 40 gigabytes (“GB”) to 400 GB, nominal rotation speeds of 5400, 7200 and 10,000 revolutions per minute (“RPM”), and offer interfaces including Enhanced Integrated Drive Electronics (“EIDE”) and Serial Advanced Technology Attachment (“SATA”). The 2.5-inch form factor drives have capacities ranging from 40 GB to 80 GB, nominal rotation speed of 5400 RPMs, and offer the EIDE interface. In addition, the Company has plans to enter the 1.0-inch hard disk drive market in the future. The Company anticipates that 1.0 inch hard disk drive products could be used in a variety of handheld consumer devices such as MP3 players, cameras, and cell phones.

      The Company sells its products worldwide to original equipment manufacturers (“OEMs”) for inclusion in computer systems or subsystems, and to distributors, resellers and retailers. The Company’s hard disk drive products are currently manufactured in Malaysia and Thailand. For geographical financial data, see the Company’s Consolidated Financial Statements and Note 9 thereto included in this Annual Report on Form 10-K.

Market Overview

      For calendar year 2004, the Company believes that the total market for hard disk drives was more than 300 million units, or almost $24 billion. Over half of these unit shipments were to the desktop PC market. Thus, total hard disk drive unit growth depends greatly on developments in the PC market. WD believes that the demand for hard disk drives in the PC market will continue to grow in part due to:

      The Company believes the rate of hard disk drive unit growth in the desktop PC market is affected by several factors, including maturing PC markets in North America and Western Europe, an increase in first-time buyers of PCs in Eastern Europe and Asia, the lengthening of PC replacement cycles and an increasing preference for notebook systems.

      The Company expects that the mobile computing market, which is primarily notebook computers, to grow faster than the desktop PC market due to customer preference in the next three years. Western Digital entered the mobile hard disk drive market in October 2004, commencing volume production of its WD Scorpio^tm family of 2.5-inch hard disk drives for notebooks.

      As the market for consumer applications expands, additional investments by the Company will be required. For example, CE products such as handheld digital audio players currently utilize sub-2.5-inch form factor hard disk drives. In January 2005, Western Digital announced it has plans to enter the miniature hard disk drive market with a 1.0-inch 6-gigabyte product. In addition, while CE products may require hard disk drives that are similar in nature to desktop hard disk drives, these products have often required specialized features or functions driving additional development versus desktop products.

      The enterprise market for hard disk drives focuses on customers that make workstations, servers, network attached storage devices, storage area networks, and other computing systems or subsystems. Western Digital serves this market through its application of the SATA interface. The SATA interface contains many of the same benefits of the small-computer-systems-interface, or SCSI — the predominant interface currently used in most enterprise hard disk drive applications. The Company believes that the use of the SATA interfaces in enterprise hard disk drives is growing.

Results of Operations

      In 2005, Western Digital’s net revenue increased by 19% to $3.6 billion on unit shipments of 61.4 million as compared to 48.3 million in 2004. In 2005, 21% of WD’s revenue was derived from non-desktop PC sources including CE products, enterprise applications, notebook PCs and retail sales as compared to 14% in 2004. Gross margin increased to 16.2% from 15.2% in 2004. Operating income increased by $42 million to $197 million, which included the impact of a $19 million charge for the settlement of a patent infringement lawsuit. Operating margins increased to 5.4% as a percentage of net revenue in 2005 compared with 5.1% in 2004. Western Digital generated $461 million in cash flow from operations in 2005 compared with $190 million in 2004, finishing the year with $598 million in cash and short-term investments, an increase of $221 million from the prior year.

      Historically, industry unit shipments have increased 5% to 10% between the June and September quarters. The Company anticipates traditional seasonal demand trends for the hard disk drive industry in the September 2005 quarter. WD also expects to continue to benefit from its growing participation in the CE market and the on-going volume ramp of its Scorpio 2.5-inch hard disk drives.

      The following table sets forth, for the periods indicated, summary information from the Company’s statements of income (in millions).

      Net revenue was $3.6 billion for 2005, an increase of 19% or $592 million from 2004. Total unit shipments increased to 61.4 million for the year as compared to 48.3 million for the prior year. This unit increase resulted from the Company’s higher desktop market share, stronger overall demand for hard disk drives in the desktop PC market and WD’s increasing focus on the non-desktop PC market. For example, WD shipped 6.6 million units to the CE market in 2005 as compared to 2.8 million units in 2004. The growth in total unit shipments was partially offset by a $4 per unit decline in average selling prices (“ASPs”) to $59 per unit for 2005.

      Revenue contribution by geographic region for 2005 was 38% from the Americas, 29% from Europe and 33% from Asia compared to 41%, 30% and 29%, respectively, for 2004 and 48%, 30% and 22%, respectively, for 2003. These changes reflect the Company’s continued focus on revenue growth in emerging geographic markets, primarily in Asia.

      Revenue contribution by sales channel for 2005 was 58% from OEMs, 36% from distributors and 6% from the retail channel, compared to 51%, 42% and 7%, respectively, for 2004 and 52%, 40% and 8%, respectively for 2003. WD’s revenue contribution from OEM’s increased in 2005 due to higher sales to the non-desktop PC markets, which are serviced primarily by OEM’s.

      Net revenue increased $328 million, or 12%, in 2004 from 2003. This increase in net revenue was primarily due to the Company’s improved market share as well as an increase in demand for hard disk drives in the PC market. Unit shipments increased to 48.3 million in 2004 from 39.7 million in 2003, while ASPs decreased to $63 per unit in 2004 from $68 per unit in 2003.

      Gross margin percentage increased to 16.2% for 2005 from 15.2% for 2004. The Company’s 2004 gross margin was impacted by start-up expenses and other charges totaling $18 million relating to the Company’s head manufacturing operations acquired in July 2003. The increase in gross margin percentage over the prior year was also impacted by continuing improvements in quality, manufacturing cost efficiencies and product mix, partially offset by unit price declines. The gross margin percentage for 2003 was 16.3%, which included the impact of a $19 million charge for the settlement of litigation. The decrease in gross margin percentage from 2003 to 2004 was primarily a result of the $18 million of start-up expenses incurred in 2004 relating to the acquisition of the Company’s head manufacturing operations as well as aggressive pricing pressures. WD was able to partially offset the 2004 impact of these pricing conditions and start-up related costs with the ongoing accretive benefit of its head manufacturing operations.

      Total operating expenses, consisting of research and development (“R&D”) and selling, general and administrative (“SG&A”), were 10.8% of net revenue in 2005, as compared to 10.1% of net revenue in 2004 and 9.4% of net revenue in 2003. Operating expenses are expected to increase slightly for the first fiscal quarter of 2006 as a result of the Company’s continued investment in the expansion of its product and technology portfolio and the costs associated with expensing stock options.

      R&D expense was $239 million, $201 million and $135 million for 2005, 2004 and 2003, respectively. The increase of $38 million in R&D expense in 2005 over 2004 was primarily related to development of new product platforms in support of WD’s entry into new markets, expenditures for advanced head technologies and an increase of $26 million in employee incentive compensation programs. The increase of $66 million in R&D in 2004 over 2003 was due to head-design, mobile and enterprise platform development, as well as a $26 million charge for acquired in-process research and development related to the Read-Rite asset acquisition.

      SG&A expense was $154 million, $106 million and $121 million for 2005, 2004 and 2003, respectively. The $48 million increase in SG&A expense in 2005 from 2004 was primarily due to an expansion of sales resources to support increasing PC demand in certain geographic regions and the growing mobile and CE markets, an increase of $15 million in employee incentive compensation programs and a $19 million charge for the settlement of a patent infringement lawsuit. The $15 million decrease in SG&A expense in 2004 from 2003 was primarily related to a reduction in employee incentive compensation programs and continuing cost reductions.

      Net interest and other income was $5 million, $0 and $3 million in 2005, 2004 and 2003, respectively. This includes net investment gains of $4 million in 2003. Excluding these net gains, net interest and other income (expense) was $5 million, $0 and ($1) million in 2005, 2004 and 2003, respectively. The increase in net interest income in 2005 over 2004 was primarily due to a higher average cash and short-term investments balance as well as an increase in the rates of return on investments, yielding higher interest income in 2005 as compared to 2004. The increase in net interest income in 2004 over net interest expense in 2003 was primarily due to the Company’s redemption of its convertible debentures during the third quarter of 2003, resulting in lower interest expense in 2004.

      Income tax expense was $4 million, $4 million and $8 million in 2005, 2004 and 2003, respectively. Tax expense as a percentage of income before taxes was 1.9%, 2.5% and 4.0% for 2005, 2004 and 2003, respectively. Differences between the effective tax rates and the U.S. Federal statutory rate are primarily due to tax holidays in Malaysia and Thailand that expire at various times ranging from 2008 to 2019. The 2005 effective tax rate benefited by approximately 0.7% from the favorable resolution of certain tax contingencies. The decrease in income tax expense from 2003 to 2004 is primarily related to lower overall earnings in 2004 and a more favorable mix of earnings within certain tax jurisdictions.

Liquidity and Capital Resources

      Western Digital ended fiscal 2005 with total cash, cash equivalents and short-term investments of $598 million, an increase of $220 million from July 2, 2004. The Company’s investment policy is to manage its investment portfolio to preserve principal and liquidity while maximizing return through the full investment of available funds. A large portion of Western Digital’s available funds is invested in auction rate securities, which are short-term investments in bonds with original maturities greater than 90 days. The following table summarizes the results of the Company’s statements of cash flows for the three-year periods ended July 1, 2005, July 2, 2004 and June 27, 2003.

      Net cash provided by operating activities during 2005 was $461 million as compared to $190 million during 2004 and $258 million for 2003. Cash flow from operations consists of net income, adjusted for non-cash charges, plus or minus working capital changes. This represents the Company’s principal source of cash. Net cash provided by working capital changes was $128 million for 2005 as compared to net cash used to fund working capital of $89 million for 2004 and net cash provided by working capital of $45 million for 2003.

      Western Digital’s working capital requirements depend upon the effective management of its cash conversion cycle, which measures how quickly a company can convert its products into cash through sales. The cash conversion cycles for 2005, 2004 and 2003 were as follows:

      The improvement in the cash conversion cycle for 2005 was primarily due to better alignment in the timing of the Company’s inventory build and sales schedules. Cash flow from operations for 2005 also benefited from an increase in other expenses that did not require the use of cash in 2005. The decrease in the 2004 cash conversion cycle as compared to 2003 was primarily due to a higher accounts receivable balance associated with changes in the Company’s mix of customers and higher work in process inventory associated with the head manufacturing operations. Cash flow from operations for 2004 was also impacted by the payment of a $45 million litigation settlement.

      Net cash used in investing activities for 2005 was $314 million as compared to $259 million for 2004 and $59 million for 2003. During 2005, cash used in investing activities consisted of $233 million for capital expenditures and $81 million for short-term investments. The net cash used in investing activities for 2004 consisted of $132 million for capital expenditures, $95 million for the Read-Rite asset acquisition and $32 million for short-term investments. The increase in capital expenditures in 2005 was primarily a result of assets purchased to upgrade the Company’s head manufacturing capabilities, increased desktop and mobile hard disk drive production capabilities and for the normal replacement of existing assets. The increase in short-term investments in 2005 was a result of additional investments in auction rate securities. The 2003 investing activities related primarily to capital expenditures. The increase in capital expenditures in 2004 was primarily for assets purchased to upgrade the Company’s head manufacturing capabilities, increase desktop hard disk drive production capabilities and for the normal replacement of existing assets. For 2006, capital expenditures are expected to be approximately $275 million to $300 million. This increase in capital expenditures is expected to consist primarily of investments in advanced head technologies, new product platforms and capacity for WD’s broadening and growing product portfolio.

      Net cash used in financing activities for 2005 was $7 million as compared to net cash provided by financing activities of $21 million for 2004 and net cash used in financing activities of $30 million for 2003. The net cash used in financing activities in 2005 consisted of $45 million used for common stock repurchases and $20 million for debt payments partially offset by $58 million received upon issuance of common stock under employee plans. The net cash provided by financing activities for 2004 consisted primarily of $24 million received upon issuance of common stock under employee plans and $14 million in net proceeds from long-term debt partially offset by $16 million used for common stock repurchases. The net cash used by financing activities for 2003 consisted primarily of $68 million used for redemption of the Company’s remaining convertible debentures, partially offset by $44 million received upon issuance of common stock under employee plans.

Capital Commitments

      The following is a summary of the Company’s significant contractual cash obligations and commercial commitments at July 1, 2005 (in millions):

      The Company has a $125 million credit facility (“Senior Credit Facility”) consisting of a revolving credit line (subject to outstanding letters of credit and a borrowing base calculation) and a term loan of $38 million. Both the revolving credit facility and the term loan mature on September 19, 2008 and are secured by the Company’s accounts receivable, inventory, 65% of its stock in its foreign subsidiaries and other assets. For the year ended July 1, 2005, the Company had no borrowings on the revolving credit line and the average variable rate on the Company’s term loan was 4.5%.

      The Senior Credit Facility prohibits the payment of cash dividends on common stock and contains specific financial covenants. The Company is required to maintain an available liquidity level of $300 million at the end of each quarter. Available liquidity is defined as cash plus eligible trade receivables. As of July 1, 2005, the Company was in compliance with this covenant. Should the Company’s available liquidity be less than $300 million, the Company would then be subject to minimum EBITDA (earnings before interest, taxes, depreciation and amortization) requirements and capital expenditure limitations.

      The term loan requires quarterly principal payments of approximately $3 million. Principal payments made on the term loan increase the amount of revolving credit available. At July 1, 2005, $85 million was available for borrowing under the revolving credit line and the Company had $3 million in outstanding letters of credit.

      In the normal course of business, the Company enters into purchase orders with suppliers for the purchase of hard disk drive components used to manufacture the Company’s products. These purchase orders generally cover forecasted component supplies needed for production during the next quarter, are recorded as a liability upon receipt of the components, and generally may be changed or canceled at any time prior to shipment of the components. In some cases the Company may be obligated to pay for certain costs related to changes to, or cancellation of, a purchase order, such as costs incurred for raw materials or work in process.

      The Company has entered into long-term purchase agreements with various component suppliers. The commitments are subject to minimum quality requirements. In addition, the dollar amount of the purchases may depend on the specific products ordered and future price negotiations. The estimated related minimum purchase requirements are included in “Purchase Obligations” in the table above.

      The Company enters into, from time to time, other long-term purchase agreements for components with certain vendors. Generally, future purchases under these agreements are not fixed and determinable as they depend on the Company’s overall unit volume requirements and are contingent upon the prices, technology and quality of the supplier’s products remaining competitive. These arrangements are not included under “Purchase Obligations” in the table above. See below under the heading “Risk Factors That May Affect Future Results” for a discussion of these commitments.

      The Company purchases short-term, forward exchange contracts to hedge the impact of foreign currency fluctuations on certain underlying assets, liabilities and commitments for operating expenses and product costs denominated in foreign currencies. See Part II, Item 7A, under the heading “Disclosure About Foreign Currency Risk,” for the Company’s current forward exchange contract commitments.

      In the ordinary course of business, the Company may provide indemnifications of varying scope and terms to customers, vendors, lessors, business partners and other parties with respect to certain matters, including, but not limited to, losses arising out of our breach of such agreements, services to be provided by us, or from intellectual property infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with its directors and certain of its officers that will require it, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. The Company maintains director and officer insurance, which may cover certain liabilities arising from its obligation to indemnify its directors and officers in certain circumstances.

      It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Such indemnification agreements may not be subject to maximum loss clauses. Historically, the Company has not incurred material costs as a result of obligations under these agreements.

      WD announced a stock repurchase program on May 5, 2004. Under the program, the Company may purchase on the open market up to $100 million of its common stock depending on market conditions and other corporate considerations. Stock repurchases are expected to be funded principally by operating cash flow. During 2005, WD repurchased 4.8 million shares of common stock at a total cost of $45 million. In addition, between July 2, 2005 and September 9, 2005 the Company repurchased 0.4 million shares of common stock at a cost of $6 million. Since the inception of the program and through September 9, 2005, the Company has repurchased 7.1 million shares for a total cost of $67 million (including commissions). WD may continue to repurchase its stock as it deems appropriate and market conditions allow.

      Western Digital believes its current cash, cash equivalents and short-term investments will be sufficient to meet its working capital needs through the foreseeable future. There can be no assurance that the Senior Credit Facility will continue to be available to the Company. Also, WD’s ability to sustain its working capital position is dependent upon a number of factors that are discussed below under the heading “Risk Factors That May Affect Future Results.” The Company currently anticipates that it will continue to utilize its liquidity and cash flows to improve the efficiency and capability of its existing hard disk drive and head manufacturing operations.

Critical Accounting Policies

      The Company has prepared the accompanying consolidated financial statements in conformity with accounting principles generally accepted in the United States. The preparation of the financial statements requires the use of judgment and estimates that affect the reported amounts of revenues, expenses, assets and liabilities. The Company has adopted accounting policies and practices that are generally accepted in the industry in which it operates. The Company believes the following are its most critical accounting policies that affect significant areas and involve management’s judgment and estimates. If these estimates differ significantly from actual results, the impact to the consolidated financial statements may be material.

      In accordance with standard industry practice, Western Digital has agreements with resellers that provide limited price protection for inventories held by resellers at the time of published list price reductions and other incentive programs. In accordance with current accounting standards, the Company recognizes revenue upon shipment or delivery

to resellers and records a reduction to revenue for estimated price protection and other programs in effect until the resellers sell such inventory to their customers. Adjustments are based on anticipated price decreases during the reseller holding period, estimated amounts to be reimbursed to qualifying customers, as well as historical pricing information. If end-market demand for hard disk drives declines significantly, the Company may have to increase sell-through incentive payments to resellers, resulting in an increase in price protection allowances, which could adversely impact operating results.

      Western Digital establishes an allowance for doubtful accounts by analyzing specific customer accounts and assessing the risk of loss based on insolvency, disputes or other collection issues. In addition, the Company routinely analyzes the different receivable aging categories and its bad debt loss history and establishes reserves based on a combination of past due receivables and expected future losses based primarily on the Company’s historical levels of bad debt losses. If the financial condition of a significant customer deteriorates resulting in its inability to pay its accounts when due, or if the overall loss history of the Company changes significantly, an adjustment in the Company’s allowance for doubtful accounts would be required, which could affect operating results.

      Western Digital records provisions against revenue and cost of revenue for estimated sales returns in the same period that the related revenue is recognized. The Company bases these provisions on existing product return notifications as well as historical returns by product type (see “Warranty”). If actual sales returns exceed expectations, an increase in the sales return provision would be required, which could negatively affect operating results.

      Western Digital records an accrual for estimated warranty costs when revenue is recognized. Warranty covers costs of repair or replacement of the hard disk drive over the warranty period, which generally ranges from one to five years. The Company has comprehensive processes with which to estimate accruals for warranty, which include specific detail on hard disk drives in the field by product type, historical field return rates and costs to repair. If actual product return rates or costs to repair returned products differ significantly from current expectations, a change in the warranty provision would be required. For a summary of historical changes in estimates related to pre-existing warranty provisions, refer to Part II, Item 8, Notes to Consolidated Financial Statements, Note 5 “Commitments and Contingencies” included in this Annual Report on Form 10-K.

      Inventories are valued at the lower of cost (first-in, first-out basis) or net realizable value. Inventory write-downs are recorded for the valuation of inventory at the lower of cost or net realizable value by analyzing market conditions and estimates of future sales prices as compared to inventory costs and inventory balances.

      The Company evaluates inventory balances for excess quantities and obsolescence on a regular basis by analyzing backlog, estimated demand, inventory on hand, sales levels and other information, and reduces inventory balances to net realizable value for excess and obsolete inventory based on the analysis. Unanticipated changes in technology or customer demand could result in a decrease in demand for one or more of the Company’s products, which may require an increase in inventory balance adjustments that could negatively affect operating results.

      Western Digital applies Statement of Financial Accounting Standards No. 5, “Accounting for Contingencies,” to determine when and how much to accrue for and disclose related to legal and other contingencies. Accordingly, the Company accrues loss contingencies when management, in consultation with its legal advisors, concludes that a loss is probable and reasonably estimable. (Refer to Part II, Item 8, Notes to Consolidated Financial Statements, Note 6 “Legal Proceedings” included in this Annual Report on Form 10-K). The ability to predict the ultimate outcome of such matters involves judgments, estimates and inherent uncertainties. The actual outcome of such matters could differ materially from management’s estimates.

      Western Digital’s deferred tax assets, which consist primarily of net operating loss and tax credit carryforwards, are fully reserved due to management’s determination that it is more likely than not that these assets will not be realized. This determination is based on the weight of available evidence, the most significant of which is the Company’s loss history in the related tax jurisdictions. Should this determination change in the future, some amount of deferred tax assets could be recognized, resulting in a tax benefit or a reduction of future tax expense. The Company records estimated tax liabilities to the extent the contingencies are probable and can be reasonably estimated. However, the actual liability in any such tax contingencies may be materially different from our estimates, which could result in the need to record additional tax liabilities or potentially adjust previously recorded tax liabilities.

      In November 2004, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards No. 151, “Inventory Costs, an Amendment of ARB No. 43, Chapter 4” (SFAS No. 151), which clarifies the accounting for abnormal amounts of idle facility expense, freight, handling costs and wasted material (spoilage) and requires those items be recognized as current period charges regardless of whether they meet the definition of “so abnormal”. SFAS No. 151 is effective for inventory costs incurred during fiscal years beginning after June 15, 2005. The Company does not expect the adoption of SFAS No. 151 to have a material impact on its financial statements.

      In December 2004, the FASB issued revised statement SFAS No. 123, “Share-Based Payment” (SFAS No. 123-R), which supersedes APB Opinion No. 25 and replaces the current SFAS No. 123. SFAS No. 123-R requires companies to expense the estimated fair value of employee stock options and similar awards and provides guidance on the valuation methods used in determining the estimated fair value. The provisions of SFAS No. 123-R will be effective beginning with the Company’s first quarter of fiscal year 2006. Under SFAS No. 123-R, compensation expense for existing awards where the requisite service period has not been completed by the effective date will be charged to expense over the remaining service period using the same fair value currently calculated for pro forma disclosure purposes under SFAS No. 123. For fiscal year 2005, the proforma net impact of stock option expense as reported in footnote 1 to the consolidated financial statements was approximately $25 million. The Company is currently in the process of determining the impact of SFAS 123-R on its 2006 financial statements. The actual effect of adopting SFAS 123R will be dependent on several factors including the levels and timing of future share-based payment grants, the assumed award forfeiture rate and the method of recognizing the fair value of awards over the service period.

      In March 2005, the FASB issued FIN 47, “Accounting for Conditional Asset Retirement Obligations, an interpretation of FASB Statement No. 143” (“FIN 47”), which requires an entity to recognize a liability for the fair value of a conditional asset retirement obligation when incurred if the liability’s fair value can be reasonably estimated. FIN 47 is effective for fiscal years ending after December 15, 2005. The Company does not expect the adoption of FIN 47 to have a material impact on its financial statements.

Risk Factors That May Affect Future Results

      The hard disk drive industry historically has experienced declining ASPs. Although the rate of decline has moderated in recent years, there can be no assurance that this trend will continue. Our ASPs tend to decline when competitors lower prices as a result of decreased costs or to absorb excess capacity, liquidate excess inventories, restructure or attempt to gain market share. Our ASPs also decline when there is a shift in the mix of product sales, and sales of lower priced products increase relative to those of higher priced products.

      To achieve consistent success with our customers who manufacturer computers, systems and consumer electronic products, we must balance several key attributes such as time-to-market, time-to-volume, quality, cost, service, price and a broad product portfolio. If we fail to:

our operating results could be adversely affected.

      Product life cycles have been extending since the middle of calendar year 2002 due in large part to a decrease in the rate of hard disk drive areal density growth. However, there can be no assurance that this trend will continue. If longer product life cycles continue, we may need to develop new technologies or programs to reduce our costs on any particular product in order to maintain competitive pricing for such product. This may result in an increase in our overall expenses and a decrease in our gross margins, both of which could adversely affect our operating results. If product life cycles shorten, it may be more difficult to recover the cost of product development before the product becomes obsolete. Our failure to recover the cost of product development in the future could adversely affect our operating results.

      New products in the desktop hard disk drive market may require higher areal densities than previous product generations, posing formidable technical and manufacturing challenges. Higher areal densities require existing head technology to be improved or new technology developed to accommodate more data on a single disk. In addition, our introduction of new products during a technology transition increases the likelihood of unexpected quality concerns. Our failure to bring high quality new products to market on time and at acceptable costs may put us at a competitive disadvantage to companies that achieve these results. In addition, technology improvements may require us to reduce the price on existing products to remain competitive.

      Storage capacity of the hard disk drive, as manufactured by us, is determined by the number of disks and each disk’s areal density. Areal density is a measure of the amount of magnetic bits that can be stored on the recording surface of the disk. Generally, the higher the areal density, the more information can be stored on a single platter. Historically, we have been able to achieve a large percentage of cost reduction through increases in areal density. Increases in areal

density mean that the average drive we sell has fewer heads and disks for the same capacity and, therefore, may result in a lower component cost. However, because increases in areal density have become more difficult in the hard disk drive industry, such increases may require increases in component costs. In addition, other opportunities to reduce costs may not continue at historical rates. Our inability to achieve cost reductions could adversely affect our operating results.

      Historically, the industry has experienced periods of increased areal density growth rates. Although in recent years there has been a decrease in the rate of areal density growth, if industry conditions return to periods of increased growth rates, the rate of increase in areal density may exceed the increase in our customers’ demand for aggregate storage capacity. This could lead to our customers’ storage capacity needs being satisfied with more lower-cost single-surface drives, thereby decreasing our revenue. As a result, even with increasing aggregate demand for storage capacity, our ASPs could decline, which could adversely affect our results of operations.

      Over the past few years the consumer market for desktop computers has shifted significantly towards lower priced systems. If we are not able to offer a competitively priced hard disk drive for the low-cost PC market, our share of that market will likely fall, which could harm our operating results.

      The market for hard disk drives is also fragmenting into a variety of devices and products. Many industry analysts expect, as do we, that as communications are increasingly converted to digital technology from the older, analog technology, the technology of computers and consumer electronics will continue to converge, and hard disk drives will be found in many CE products other than computers.

      In addition, we expect that the consumer market for multi-media applications, including audio-video products, incorporating a hard disk drive will continue to grow. However, because this market remains relatively new, accurate forecasts for future growth remain challenging. Moreover, some of the devices, such as personal video recorders and digital video recorders, or other products outside of the CE market, may require attributes not currently offered in our products, which have resulted in a need to expend capital to develop new interfaces, form factors, technical specifications or hard disk drive features, increasing our overall operational expense without corresponding incremental revenue at this stage. If we are not successful in using our hard disk drive technology and expertise to develop new products for the emerging CE market, or if we are required to incur significant costs in developing such products, it may harm our operating results.

      To remain a significant supplier of hard disk drives, we will need to offer a broad range of hard disk drive products to our customers. We currently offer a variety of 3.5-inch hard disk drives for the desktop computer and CE markets, and we also offer 2.5-inch form factor hard disk drives for the mobile market. However, demand for hard disk drives may shift to products in smaller form factors, which our competitors may already offer. We recently announced our entry into the sub-2.5-inch hard disk drive market with a family of 1.0-inch drives, which we expect to ship in the future. We face various challenges in manufacturing a 1.0-inch hard disk drive because it requires the development of new manufacturing technologies and processes. If we are not able to adequately address these challenges, our expected shipment of this product may be delayed, resulting in a delay in our ability to realize revenue from this product.

      In addition, the enterprise and desktop PC markets are transitioning from the PATA interface to higher speed interfaces such as SATA to handle higher data transfer rates. We currently offer SATA products; however, the transition of technology and the introduction of new products are challenging and create risks. For example, acceptance of the SATA interface may not continue to grow, or customers may choose to purchase alternative interfaces that may not be compatible with future generations of SATA hard disk drives. Moreover, our customers may require new SATA features that we may not be able to deliver in a timely and cost effective manner.

      While we continue to develop new products and look to expand into other applications, the success of our new product introductions is dependent on a number of factors, including difficulties faced in manufacturing ramp, market acceptance, effective management of inventory levels in line with anticipated product demand, and the risk that our new

products may have quality problems or other defects in the early stages of introduction that were not anticipated in the design of those products. If we fail to successfully develop and manufacture new products, customers may decrease the amount of our products that they purchase, and we may lose business to our competitors who offer these products or who use their dominance in the enterprise or mobile market to encourage sales of hard disk drives.

      We began shipping 2.5-inch form factor hard disk drives for the mobile market during calendar year 2004. Although many of our customers who purchase 3.5-inch form factor hard disk drives also purchase the 2.5-inch form factor drives, the markets are characterized by different competitors, different sales channels and different overall requirements. If we are unable to adapt to these differences, we would have a competitive disadvantage to companies that are successful in this regard, and our business and financial results could suffer. In addition, if we incur significant costs in manufacturing and selling the 2.5-inch and sub-2.5-inch form factor hard disk drives, and if we are unable to recover those costs from sales of the products, then we may not be able to compete successfully in this market and our operating results may suffer.

      We sell our retail-packaged products directly to a select group of major retailers such as computer superstores and CE stores, and authorize sales through distributors to other retailers. Our current retail customer base is primarily in the United States, Canada and Europe. We are facing increased competition from other companies for shelf space at major retailers, which could result in lower gross margins. If we fail to successfully maintain our market share in North America, our operating results may be adversely affected. In certain markets, we are trying to grow market share, and in the process may face strong competition, which could result in lower gross margins. We will continue to introduce new products in the retail market that incorporate our disk drives. There can be no assurance that these products gain market acceptance, and if they do not, our operating results could suffer.

      Under our business model, we do not manufacture any of the component parts used in our hard disk drives, other than heads. As a result, the success of our products depends on our ability to gain access to and integrate parts that are “best in class” from reliable component suppliers. To do so, we must effectively manage our relationships with our major component suppliers. We must also effectively integrate different products from a variety of suppliers, each of which employs variations on technology, which can impact, for example, feasible combinations of heads and media components. In August 2003, we settled litigation we were engaged in with a supplier who previously was the sole source of read channel devices for our hard disk drives. As a result of the disputes that gave rise to the litigation, our profitability was at risk until another supplier’s read channel devices could be designed into our products. Similar disputes with other strategic component suppliers could adversely affect our operating results.

      Because we depend on a limited number of suppliers for certain hard disk drive components and manufacturing equipment, an increase in the cost of such components or equipment, an extended shortage of required components or equipment, failure of a key supplier’s business process, or the failure of key suppliers to remain in business, adjust to market conditions, or to meet our quality, yield or production requirements could significantly harm our operating results. Our future operating results may also depend substantially on our suppliers’ ability to timely qualify their components in our programs, and their ability to supply us with these components in sufficient volumes to meet our production requirements. A number of the components that we use are available from only a single or limited number of qualified outside suppliers, and may be used across multiple product lines. In addition, some of the components (or component types) used in our products are used in other devices, such as mobile telephones and digital cameras. If there is a significant simultaneous upswing in demand for such a component (or component type) from several high volume industries, resulting in a supply reduction, or a component is otherwise in short supply, or if a supplier fails to qualify or has a quality issue with a component, we may experience delays or increased costs in obtaining that component. For

example, the hard disk drive industry is currently facing a tightness in the availability of media (rotating magnetic disks) components. We may experience production delays if we are unable to obtain the necessary components or sufficient quantities of components. If a component becomes unavailable, we could suffer significant loss of revenue.

      To reduce the risk of component shortages, we attempt to provide significant lead times when buying these components. As a result, we may be subject to cancellation charges if we cancel orders, which may occur when we make technology transitions. In addition, we may enter into contractual commitments with certain component suppliers in an effort to increase and stabilize the supply of those components, and enable us to purchase such components at favorable prices. These commitments may require us to buy a substantial number of components from the supplier or make significant cash advances to the supplier.

      In addition, certain equipment we use in our manufacturing or testing processes is available only from a limited number of suppliers. Some of this equipment uses materials that at times could be in short supply. If these materials are not available, or are not available in the quantities we require for our manufacturing and testing processes, our ability to manufacture our products could be impacted, and we could suffer significant loss of revenue.

      The cost and availability of certain commodity materials used to manufacture hard disk drives and key components is critical to our success. Shortages of such materials such as steel and aluminum and the rising cost of oil increase our costs and may result in lower operating margins if we are unable to pass such increased costs through to our customers.

      Currently the hard disk drive industry uses giant magnetoresistive head technology, which allows significantly higher storage capacities than the previously utilized thin-film head technology. However, the industry is developing new recording technologies that may enable greater recording densities than currently available using magnetoresistive head technology, including perpendicular, current perpendicular-to-plane, and tunneling junction technology. If the industry experiences a fundamental shift in recording technology, hard disk drive manufacturers would need to timely adjust their designs and processes to accommodate the new technology in order to remain competitive. As a result, we could incur substantial costs in developing new technologies, media, and tools to remain competitive. We may also become more dependent on suppliers to ensure our access to components that accommodate the new technology. These results would increase our operating costs, which may negatively impact our operating results.

      Our vertical integration of head manufacturing has resulted in a fundamental change in our operating structure, as we are now manufacturing heads for use in the hard disk drives we manufacture. Consequently, we make more capital investments than we would if we were not vertically integrated and carry a higher percentage of fixed costs than assumed in our prior financial business model. If the overall level of production decreases for any reason, and we are unable to reduce our fixed costs to match sales, our head manufacturing assets may face under-utilization that may impact our results of operations. We are therefore subject to additional risks related to overall asset utilization, including the need to operate at high levels of utilization to drive competitive costs, and the need for assured supply of components, especially hard disk drive media, that is optimized to work with our heads.

      In addition, we may incur additional risks, including:

      If we do not adequately address the challenges related to our head manufacturing operations, our ongoing operations could be disrupted, resulting in a decrease in our revenue or profit margins and negatively impacting our operating results.

      As a result of our head manufacturing operations, we are developing and manufacturing a substantial portion of the heads used in the hard disk drives we manufacture. Consequently, we are more dependent upon our own development and execution efforts and less able to take advantage of head technologies developed by other head manufacturers. There can be no assurance, however, that we will be successful in timely and cost-effectively developing and manufacturing heads for products using perpendicular recording technology, or other future technologies. We also may not achieve acceptable manufacturing yields using such technologies necessary to satisfy our customers’ product needs, or we may encounter quality problems with the heads we manufacture. In addition, we may not have access to external sources of supply without incurring substantial costs. For example, the Company anticipates using perpendicular recording heads in certain products in the future. If we fail to develop new technologies such as perpendicular recording in a timely manner, or if we encounter quality problems with the heads we manufacture, and if we do not have access to external sources of supply that incorporate new technologies, we would have a competitive disadvantage to companies that are successful in this regard, and our business and financial results could suffer.

      Our hard disk drives are manufactured in facilities in Malaysia and Thailand. In addition, we operate a head wafer fabrication and research and development facility in Fremont, California and a slider fabrication, head gimbal assembly, head stack assembly, and research and development facility in Thailand. A fire, flood, earthquake or other disaster, condition or event such as a power outage that adversely affects any of these facilities or our ability to manufacture could result in a loss of sales and revenue and harm our operating results.

      We are subject to risks associated with our foreign manufacturing operations, including:

      Because we manufacture our products abroad, our operating costs are subject to fluctuations in foreign currency exchange rates. Further fluctuations in the exchange rate of the Thai Baht and of the Malaysian Ringgit may negatively impact our operating results.

      The Thai Baht is a free floating currency while the Malaysian Ringgit exchange rate policy recently defined by the Malaysian government is one of a managed float. We have attempted to manage the impact of foreign currency exchange rate changes by, among other things, entering into short-term, forward contracts. However, these contracts do not cover our full exposure and can be canceled by the issuer if currency controls are put in place. Currently, we hedge the Thai Baht, Euro and British Pound Sterling with forward contracts.

      There has been a trend toward a weakening U.S. dollar relative to most foreign currencies. If this trend continues, the U.S. dollar equivalents of unhedged manufacturing costs could increase because a significant portion of our production costs are foreign-currency denominated. Conversely, there would not be an offsetting impact to revenues since revenues are substantially U.S. dollar denominated.

      We regularly engage in new product qualification with our customers. To be considered for qualification, we must be among the leaders in time-to-market with our new products. Once a product is accepted for qualification testing, failures or delays in the qualification process can result in our losing sales to that customer until the next generation of products is introduced. The effect of missing a product qualification opportunity is magnified by the limited number of high volume computer manufacturers, most of which continue to consolidate their share of the PC market. If product life cycles continue to be extended due to a decrease in the rate of areal density growth, we may have a significantly longer period to wait before we have an opportunity to qualify a new product with a customer, which could harm our competitive position. These risks are increased because we expect cost improvements and competitive pressures to result in declining gross margins on our current generation products.

      The price of hard disk drives has fallen over time due to increases in supply, cost reductions, technological advances and price reductions by competitors seeking to liquidate excess inventories or attempting to gain market share. In addition, rapid technological changes often reduce the volume and profitability of sales of existing products and increase the risk of inventory obsolescence. We also face competition from other companies that produce alternative storage technologies like flash memory. These factors, taken together, may result in significant and rapid shifts in market share among the industry’s major participants. In addition, product recalls can lead to a loss of market share, which could adversely affect our operating results.

      It may be possible for our current or future competitors to gain an advantage in product technology, manufacturing technology, or process technology, which may allow them to offer products or services that have a significant advantage over the products and services that we offer. Advantages could be in capacity, performance, reliability, serviceability, or other attributes. If we are unable to match these technology advantages due to the proprietary nature of the technology, limitations on process capability or other factors, we could be at a competitive disadvantage to those competitors.

      Advances in magnetic, optical, semiconductor or other data storage technologies also could result in competitive products that have better performance or lower cost per unit of capacity than our products. High-speed semiconductor memory could compete with the Company’s hard disk drive products in the future. Semiconductor memory is much faster than magnetic hard disk drives, but currently is not competitive from a cost standpoint. Flash memory, a non-volatile semiconductor memory, is currently much more costly and, while it has higher “read” performance than hard disk drives, it has lower “write” performance. Flash memory could become competitive in the near future for applications requiring less storage capacity than that provided by hard disk drives. If these products prove to be superior in performance or cost per unit of capacity, we could be at a competitive disadvantage to the companies offering those products.

      In addition, if our competitors are able to achieve a lower cost structure for manufacturing hard disk drives by moving manufacturing facilities to advantageous locations or through other restructuring activities, and we are unable to

match their cost structure, we could be at a competitive disadvantage to those competitors as they may be able to sell hard disk drives at lower margins while remaining profitable.

      Some of our competitors earn a significant portion of their revenue from business units outside the hard disk drive industry. Because they do not depend solely on sales of hard disk drives to achieve profitability, they may be able to sell hard disk drives at lower margins and still remain profitable. In addition, if these competitors can increase sales of non hard disk drive products to the same customers, they may benefit from selling their hard disk drives at low margins. Our results of operations may be adversely affected if we can not successfully compete with these companies.

      The hard disk drive industry has been characterized by significant litigation. This includes litigation relating to patent and other intellectual property rights, product liability claims and other types of litigation. Litigation can be expensive, lengthy and disruptive to normal business operations. Moreover, the results of litigation are inherently uncertain and may result in adverse rulings or decisions. We may enter into settlements or be subject to judgments that may, individually or in the aggregate, have a material adverse effect on our business, financial condition or results of operations.

      We are currently evaluating notices of alleged patent infringement or notices of patents from patent holders. If claims or actions are asserted against us, we may be required to obtain a license or cross-license, modify our existing technology or design a new non-infringing technology. Such licenses or design modifications can be extremely costly. In addition, we may decide to settle a claim or action against us, which settlement could be costly. We may also be liable for any past infringement. If there is an adverse ruling against us in an infringement lawsuit, an injunction could be issued barring production or sale of any infringing product. It could also result in a damage award equal to a reasonable royalty or lost profits or, if there is a finding of willful infringement, treble damages. Any of these results would likely increase our costs and harm our operating results.

      Our success depends, in significant part, on the proprietary nature of our technology, including non-patentable intellectual property such as our process technology. Despite safeguards, to the extent that a competitor is able to reproduce or otherwise capitalize on our technology, it may be difficult, expensive or impossible for us to obtain necessary legal protection. Also, the laws of some foreign countries may not protect our intellectual property to the same extent as do the laws of the United States. In addition to patent protection of intellectual property rights, we consider elements of our product designs and processes to be proprietary and confidential. We rely upon employee, consultant and vendor non-disclosure agreements and contractual provisions and a system of internal safeguards to protect our proprietary information. However, any of our registered or unregistered intellectual property rights may be challenged or exploited by others in the industry, which might harm our operating results.

      Our success depends upon the continued contributions of our key personnel and skilled employees, many of whom would be extremely difficult to replace. Worldwide competition for skilled employees in the hard disk drive industry is intense. Volatility or lack of positive performance in our stock price may adversely affect our ability to retain key personnel or skilled employees who have been granted stock options. If we are unable to retain our existing key personnel or skilled employees, or hire and integrate new key personnel or skilled employees, our operating results would likely be harmed.

      Demand for our hard disk drives depends on the demand for systems manufactured by our customers and on storage upgrades to existing systems. The demand for systems has been volatile in the past and often has had an exaggerated effect on the demand for hard disk drives in any given period. As a result, the hard disk drive market has experienced periods of excess capacity which can lead to liquidation of excess inventories and intense price competition. If intense price competition occurs, we may be forced to lower prices sooner and more than expected, which could result in lower revenue and gross margins.

      The hard disk drive industry faces difficulties in accurately forecasting market and customer demand for its products. The variety and volume of products we manufacture is based in part on these forecasts. If our forecasts exceed actual market demand, or if market demand decreases significantly from our forecasts, then we could experience periods of product oversupply and price decreases, which could impact our financial performance. If our forecasts do not meet actual market demand, of if market demand increases significantly beyond our forecasts, then we may not be able to satisfy customer product needs, which could result in a loss of market share if our competitors are able to meet customer demands.

      We also use forecasts in making decisions regarding investment of our resources. For example, as the hard disk drive industry transitions from the PATA interface to the SATA interface, we may invest more resources in the development of products using the SATA interface. If our forecasts regarding the replacement of the PATA interface with the SATA interface are inaccurate, we may not have products available to meet our customers’ needs.

      In addition, although we receive forecasts from our customers, they are not obligated to purchase the forecasted amounts. We consider these forecasts in determining our component needs and our inventory requirements. If we fail to accurately forecast our customers’ product demands, we may have inadequate or excess inventory of our products or components, which could adversely affect our operating results

      A majority of our revenue comes from a few customers. For example, during 2005, one customer, Dell, accounted for 16% of our revenue, and sales to our top 10 customers, including Dell, accounted for 46% of revenue. These customers have a variety of suppliers to choose from and therefore can make substantial demands on us, including demands on product pricing and on contractual terms, which often results in the allocation of risk to us as the supplier. Even if we successfully qualify a product with a customer, the customer generally is not obligated to purchase any minimum volume of products from us and is able to terminate its relationship with us at any time. Our ability to maintain strong relationships with our principal customers is essential to our future performance. If we lose a key customer, if any of our key customers reduce their orders of our products or require us to reduce our prices before we are able to reduce costs, or if a key customer suffers financial hardship then our operating results would likely be harmed. In addition, if customer pressures require us to reduce our pricing such that our gross margins are diminished, we could decide not to sell our products to a particular customer, which could result in a decrease in our revenue.

      We may be subject to various state, federal and international laws and regulations governing the environment, including those restricting the presence of certain substances in electronic products and making producers of those products financially responsible for the collection, treatment, recycling and disposal of certain products. Such laws and regulations have been passed in several jurisdictions in which we operate, including various European Union member countries. For example, the European Union has enacted the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Directive (“RoHS”). RoHS prohibits the use of certain substances, including lead, in certain products, including hard disk drives, put on the market after July 1, 2006. Similar legislation may be enacted

in other locations where we manufacture or sell our products. We will need to ensure that we comply with such laws and regulations as they are enacted, and that our component suppliers also timely comply with such laws and regulations. If we fail to timely comply with such legislation, our customers may refuse to purchase our products, which would have a materially adverse effect on our business, financial condition and results of operations.

      We could incur substantial costs in connection with our compliance with such environmental laws and regulations, and we could also be subject to governmental fines and liability to our customers if we were found to be in violation of these laws. If we have to make significant capital expenditures to comply with environmental laws, or if we are subject to significant capital expenses in connection with a violation of these laws, our financial condition or operating results could suffer.

      We warrant our products for up to five years. We test our hard disk drives in our manufacturing facilities through a variety of means. However, there can be no assurance that our testing will reveal latent defects in our products, which may not become apparent until after the products have been sold into the market. Accordingly, there is a risk that product defects will occur, which could require a product recall. Product recalls can be expensive to implement and, if a product recall occurs during the product’s warranty period, we may be required to replace the defective product. In addition, a product recall may damage our relationship with our customers, and we may lose market share with our customers, including our OEM customers.

      Our standard warranties contain limits on damages and exclusions of liability for consequential damages and for misuse, improper installation, alteration, accident or mishandling while in the possession of someone other than the Company. We record an accrual for estimated warranty costs at the time revenue is recognized. We may incur additional operating expenses if our warranty provision does not reflect the actual cost of resolving issues related to defects in our products. If these additional expenses are significant, it could adversely affect our business, financial condition and results of operations.

      Some of our OEM customers have adopted a subcontractor model that requires us to contract directly with companies that provide manufacturing services to our OEM customers. Because these subcontractors are generally not as well capitalized as our direct OEM customers, this subcontractor model exposes us to increased credit risks. Our agreements with our OEM customers may not permit us to increase our product prices to alleviate this increased credit risk. Any credit losses we may suffer as a result of this increased risk would increase our operating costs, which may negatively impact our operating results.

      The continued threat of terrorist activity and other acts of war or hostility, including the war in Iraq, have created uncertainty in the financial and insurance markets and have significantly increased the political, economic and social instability in some of the geographic areas in which we operate. Acts of terrorism, either domestically or abroad, could create further uncertainties and instability. To the extent this results in disruption or delays of our manufacturing capabilities or shipments of our products, our business, operating results and financial condition could be adversely affected.

      We use enterprise resource planning software in the operation of our business and maintenance of business and financial data related to our daily operations. We are in the process of upgrading this software and we anticipate transitioning to new enterprise resource planning software during the next year. We may experience unexpected

difficulties in transitioning to the new software, including difficulties related to the failure or inefficient operation of the new software. Such difficulties or failures could result in our inability to access business and financial information stored on the system or the loss of such information. Any inability to access, or loss of, such information as a result of the transition or otherwise could affect our daily operations, including our ability to ship products and invoice our customers, which could have a significant adverse impact on our business, financial condition and results of operations.

      We often ship a high percentage of our total quarterly sales in the third month of the quarter, which makes it difficult for us to forecast our financial results prior to the end of the quarter. In addition, our quarterly projections and results may be subject to significant fluctuations as a result of a number of other factors including:

      We have made and continue to make a number of estimates and assumptions relating to our consolidated financial reporting. The rapidly changing market conditions with which we deal means that actual results may differ significantly from our estimates and assumptions. Key estimates and assumptions for us include:

      The market price of our common stock has been, and may continue to be, extremely volatile. Factors such as the following may significantly affect the market price of our common stock:

      In addition, general economic conditions may cause the stock market to experience extreme price and volume fluctuations from time to time that particularly affect the stock prices of many high technology companies. These fluctuations often appear to be unrelated to the operating performance of the companies.

      Securities class action lawsuits are often brought against companies after periods of volatility in the market price of their securities. A number of such suits have been filed against us in the past, and should any new lawsuits be filed, such matters could result in substantial costs and a diversion of resources and management’s attention.

      Due to the risks described herein, in the future we may be unable to maintain adequate financial resources for capital expenditures, expansion or acquisition activity, working capital and research and development. We have a credit facility, which matures on September 19, 2008. If we decide to increase or accelerate our capital expenditures or research and development efforts, or if results of operations do not meet our expectations, we could require additional debt or equity financing. However, we cannot ensure that additional financing will be available to us or available on acceptable terms. An equity financing could also be dilutive to our existing stockholders.

Item 7A.     Quantitative and Qualitative Disclosures About Market Risk

Disclosure About Foreign Currency Risk

      Although the majority of the Company’s transactions are in U.S. Dollars, some transactions are based in various foreign currencies. The Company purchases short-term, forward exchange contracts to hedge the impact of foreign currency fluctuations on certain underlying assets, liabilities and commitments for operating expenses and product costs denominated in foreign currencies. The purpose of entering into these hedge transactions is to minimize the impact of foreign currency fluctuations on the results of operations. The resulting impact from these hedge contracts is to offset a majority of the currency gains and losses in the Company’s local currency expenses. The contract maturity dates do not exceed six months. The Company does not purchase short-term forward exchange contracts for trading purposes. Currently, the Company focuses on hedging its foreign currency risk related to the Thai Baht, the Euro and the British Pound Sterling. Thai Baht contracts are designated as cash flow hedges under Statement of Financial Accounting Standards No. 133, “Accounting for Derivative Instruments and Hedging Activities.” while all other contracts are designated as fair value hedges under Statement of Financial Accounting Standards No. 52 “Foreign Currency Translation.”

      As of July 1, 2005, the Company had outstanding the following purchased foreign currency forward exchange contracts (in millions, except weighted average contract rate):

      In 2005, 2004 and 2003, total realized transaction and forward exchange contract currency gains and losses were not material to the consolidated financial statements.

Disclosure About Other Market Risks

      At the option of the Company, borrowings under the Senior Credit Facility would bear interest at either LIBOR (with option periods of one to three months) or a base rate, plus a margin. If LIBOR or the base rate increases, the Company’s interest payments would also increase. At July 1, 2005, the Company had a $38 million term loan outstanding under the Senior Credit Facility. A one percent increase in the variable rate of interest on the Senior Credit Facility would increase interest expense by approximately $0.4 million annually.

Index to Financial Statements and Financial Statement Schedule

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

Western Digital Corporation:

      We have audited the accompanying consolidated balance sheets of Western Digital Corporation and subsidiaries as of July 1, 2005 and July 2, 2004, and the related consolidated statements of income, shareholders’ equity and comprehensive income and cash flows for each of the years in the three-year period ended July 1, 2005. In connection with our audits of the consolidated financial statements, we also have audited the financial statement schedule as listed in the accompanying index. These consolidated financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements and financial statement schedule based on our audits.

      We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

      In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Western Digital Corporation and subsidiaries as of July 1, 2005 and July 2, 2004, and the results of their operations and their cash flows for each of the years in the three-year period ended July 1, 2005, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

      We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the effectiveness of the Company’s internal control over financial reporting as of July 1, 2005, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated September 9, 2005 expressed an unqualified opinion on management’s assessment of, and the effective operation of, internal control over financial reporting.

Costa Mesa, California

      We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

      A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

      Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

      In our opinion, management’s assessment that Western Digital Corporation maintained effective internal control over financial reporting as of July 1, 2005, is fairly stated, in all material respects, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Also, in our opinion, Western Digital Corporation maintained, in all material respects, effective internal control over financial reporting as of July 1, 2005, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

      We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Western Digital Corporation and subsidiaries as of July 1, 2005 and July 2, 2004, and the related consolidated statements of operations, shareholders’ equity and comprehensive income, and cash flows, and the related financial statement schedule for each of the years in the three-year period ended July 1, 2005, and our report dated September 9, 2005 expressed an unqualified opinion on those consolidated financial statements and the related financial statement schedule.

Costa Mesa, California

WESTERN DIGITAL CORPORATION

CONSOLIDATED BALANCE SHEETS

(in millions)

The accompanying notes are an integral part of these consolidated financial statements.

WESTERN DIGITAL CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

(in millions, except per share amounts)

The accompanying notes are an integral part of these consolidated financial statements.

WESTERN DIGITAL CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

The accompanying notes are an integral part of these consolidated financial statements.

WESTERN DIGITAL CORPORATION

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY and COMPREHENSIVE INCOME

(in millions)

The accompanying notes are an integral part of these consolidated financial statements.

44

WESTERN DIGITAL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

      Western Digital Corporation (the “Company” or “Western Digital” or “WD”) designs, develops, manufactures and sells hard disk drives. A hard disk drive is a device that stores data on one or more rotating magnetic disks to allow fast access to data. The Company’s hard disk drives are used in desktop personal computers, notebook computers, external storage devices, enterprise applications such as servers, workstations, network attached storage and storage area networks and in consumer electronics products such as personal/digital video recorders, satellite and cable set-top boxes and video game consoles. The Company sells its products worldwide to original equipment manufacturers (“OEMs”) for inclusion in computer systems or subsystems, and to distributors, resellers and retailers.

      Western Digital has prepared its consolidated financial statements in accordance with accounting principles generally accepted in the United States and has adopted accounting policies and practices which are generally accepted in the industry in which it operates. The Company’s significant accounting policies are summarized below.

      The Company has a 52 or 53-week fiscal year. The 2005 and 2003 fiscal years, which ended on July 1, 2005 and June 27, 2003, respectively, consisted of 52 weeks each. Fiscal year 2004, which ended on July 2, 2004, was a 53-week year.

      The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The accounts of foreign subsidiaries have been remeasured using the U.S. dollar as the functional currency. As such, gains or losses resulting from remeasurement of these accounts from local currencies into U.S. dollars are reflected in the results of operations. These gains and losses were immaterial to the consolidated financial statements. Monetary and nonmonetary asset and liability accounts have been remeasured using the exchange rate in effect at each year-end and using historical rates, respectively. Income statement accounts have been remeasured using historical monthly exchange rates.

      The Company’s cash equivalents represent highly liquid investments, primarily money market funds and commercial paper, with original maturities of three months or less.

      The Company’s short-term investments consist primarily of auction rate securities, which are short-term investments in bonds with original maturities greater than 90 days. The Company has classified these investments as “available for sale” securities under Statement of Financial Accounting Standards No. 115 “Accounting for Certain Investments in Debt and Equity Securities” (“SFAS 115”). These investments are carried at fair value.

      The carrying amounts of cash and cash equivalents and short-term investments approximate fair value for all periods presented because of the short-term maturity of these financial instruments. The carrying amount of the Company’s term loan also approximates fair value.

      The Company designs, develops, manufactures and markets hard disk drives to personal computer manufacturers, resellers and retailers throughout the world. The Company performs ongoing credit evaluations of its customers’ financial condition and generally requires no collateral. The Company maintains allowances for potential credit losses, and such

WESTERN DIGITAL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

losses have historically been within management’s expectations. At any given point in time, the total amount outstanding from any one of a number of our customers may be individually significant to the Company’s financial results. At July 1, 2005 and July 2, 2004, the Company had reserves for potential credit losses of $3.0 million and $6.1 million, respectively. The Company also has cash equivalent and short-term investment policies that limit the amount of credit exposure to any one financial institution or investment instrument and require that investments be made only with financial institutions or in investment instruments evaluated as highly credit-worthy.

      Inventories are valued at the lower of cost or net realizable value. Cost is on a first-in, first-out basis for raw materials and is computed on a currently adjusted standard basis (which approximates first-in, first-out) for work in process and finished goods.

      The cost of property and equipment is depreciated over the estimated useful lives of the respective assets. The Company’s buildings are being depreciated over periods ranging from seven to fifteen years. The majority of the Company’s equipment is being depreciated over periods of three and five years. Depreciation is computed on a straight-line basis. Leasehold improvements are amortized over the lesser of the estimated useful lives of the assets or the related lease terms.

      Intangible assets consist of purchased technology acquired during a 2004 asset acquisition. These assets are being amortized over a weighted average period of three years.

      The Company recognizes revenue in accordance with SEC Staff Accounting Bulletin No. 104, “Revenue Recognition in Financial Statements” (“SAB 104”). Under SAB 104 revenue is recognized when the title and risk of loss have passed to the customer, there is persuasive evidence of arrangement, delivery has occurred, or services have been rendered, the sales price is determinable and collectibility is reasonably assured. Revenue is recognized at the time of shipment for the Company’s OEM customers and at the time of delivery for its reseller customers.

      In accordance with standard industry practice, the Company has agreements with resellers that provide price protection for inventories held by resellers at the time of published list price reductions and other incentive programs. Either party may terminate these agreements upon written notice. In the event of termination, the Company may be obligated to repurchase a certain portion of the resellers’ inventory. The Company records a reduction to revenue for estimated price protection and other programs in effect until the resellers sell such inventory to their customers. Adjustments are based on anticipated price decreases during the reseller holding period, estimated amounts to be reimbursed to qualifying customers, as well as historical pricing information. If end-market demand for hard disk drives declines significantly, the Company may have to increase sell-through incentive payments to resellers, resulting in an increase in price protection allowances, which could adversely impact operating results. Net revenue recognized on sales to resellers was approximately $1.5 billion, $1.5 billion and $1.3 billion in 2005, 2004 and 2003, respectively. Repurchases of reseller inventory were not material in 2005, 2004 or 2003.

      Western Digital establishes an allowance for doubtful accounts by analyzing specific customer accounts and assessing the risk of loss based on insolvency, disputes or other collection issues. In addition, the Company routinely analyzes the different receivable aging categories and its bad debt loss history and establishes reserves based on a combination of past due receivables and expected future losses based primarily on the Company’s historical levels of bad debt losses. If the

WESTERN DIGITAL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

financial condition of a significant customer deteriorates resulting in its inability to pay its accounts when due, or if the overall loss history of the Company changes significantly, an adjustment in the Company’s allowance for doubtful accounts would be required, which could affect operating results.

      The Company records an accrual for estimated warranty costs as products are sold. Warranty covers costs of repair or replacement of the hard disk drive over the warranty period, which ranges from one to five years and is recorded in the accompanying balance sheet as current or long-term based upon when the expenditure is expected to occur. The Company has comprehensive processes with which to estimate accruals for warranty, which include specific detail on hard disk drives in the field by product type, historical field return rates and costs to repair. Although the Company believes that it has the continued ability to reasonably estimate warranty reserves, unforeseeable changes could cause a material change in the Company’s warranty accrual estimate. Such a change would be recorded in the period in which it was identified.

      Advertising costs are expensed as incurred. Selling, general and administrative expenses of the Company include advertising costs of $1.5 million, $1.5 million and $3.4 million in 2005, 2004 and 2003, respectively.

      The Company accounts for income taxes under the asset and liability method, which provides that deferred tax assets and liabilities be recognized for temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities and expected benefits of utilizing net operating loss (“NOL”) carryforwards. The Company records a valuation allowance where it is more likely than not that the deferred tax assets will not be realized. The impact on deferred taxes of changes in tax rates and laws, if any, are applied to the years during which temporary differences are expected to be settled and reflected in the consolidated financial statements in the period of enactment. The Company records estimated tax liabilities to the extent the contingencies are probable and can be reasonably estimated. However, the actual liability for any such tax contingencies may be materially different from the estimates, which could result in the need to record additional tax liabilities or adjust previously recorded tax liabilities.

      The Company computes basic income per share using the net income and the weighted average number of common shares outstanding during the period. Diluted income per share is computed using the net income and the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares include outstanding employee stock options, employee stock purchase plan shares and restricted stock awards.

WESTERN DIGITAL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

      The following table illustrates the computation of basic and diluted income per common share (in millions, except per share data):

      For the years ended July 1, 2005, July 2, 2004 and June 27, 2003, 6.0 million, 6.0 million and 9.0 million shares, respectively, relating to the possible exercise of outstanding stock options were not included in the computation of diluted income per share. The effects of these items were not included in the computation of diluted income per share as their effect would have been anti-dilutive.

      Statement of Financial Accounting Standards No. 123, “Accounting for Stock-Based Compensation” (“SFAS 123”), establishes the financial accounting and reporting standards for stock-based compensation plans. As permitted by SFAS 123, the Company elected to continue accounting for stock-based employee compensation plans (including shares issued under the Company’s stock option plans and Employee Stock Purchase Plan (“ESPP”), collectively called “Options”) in accordance with Accounting Principles Board Opinion No. 25, “Accounting for Stock Issued to Employees” and its related interpretations (“APB Opinion No. 25”), and to follow the pro forma net income, pro forma income per share, and stock-based compensation plan disclosure requirements set forth in SFAS 123. The following table sets forth the computation of basic and diluted earnings per share for each of the past three fiscal years and

WESTERN DIGITAL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

illustrates the effect on net income and earnings per share as if the Company had applied the fair value recognition provisions of SFAS 123 to stock-based employee compensation.