SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* MILLIGAN STEPHEN D (Last) (First) (Middle) 20511 LAKE FOREST DRIVE (Street) LAKE FOREST CA 92630 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol WESTERN DIGITAL CORP [ WDC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Sr. VP & CFO
	3. Date of Earliest Transaction (Month/Day/Year) 03/02/2005
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/02/2005		M		17,500	A	$3.85	253,925	D
Common Stock	03/02/2005		S		10,300	D	$11.75	243,625	D
Common Stock	03/02/2005		S		7,200	D	$11.8	236,425(1)	D
Common Stock								700	I	by Trust 401(K)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	$3.85	03/02/2005		M			17,500	09/23/2003(2)	09/23/2012	Common Stock	17,500	$0	87,000	D

Explanation of Responses:

1. Includes 593 shares acquired under the issuer's Employee Stock Purchase Plan on January 31, 2005.

2. The option vested 25% one year from the grant date of 9/23/2002, and an additional 6.25% vested each three-month period through 12/23/2004. The remaining shares subject to the option will vest at 6.25% each three-month period until fully vested on 9/23/2006.

Remarks:

The reporting owner acquired 142.7978 shares of WDC common stock under the issuer's 401(k) plan since his last filing. The reported indirect holdings are based on shares held under the 401(k) plan as of March 2, 2005.

	By: /s/ Sandra Garcia Attorney-in-Fact For: Stephen D. Milligan	03/04/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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