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* MURPHY JAMES J (Last) (First) (Middle) C/O WESTERN DIGITAL CORPORATION 3355 MICHELSON DRIVE, SUITE 100 (Street) IRVINE CA 92612 (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) President, WD Subsidiary
	3. Date of Earliest Transaction (Month/Day/Year) 03/04/2015
	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	03/04/2015		M		3,018	A	$29.6	55,367	D
Common Stock	03/04/2015		M		2,765	A	$38.63	58,132	D
Common Stock	03/04/2015		M		3,480	A	$43.11	61,612	D
Common Stock	03/04/2015		M		2,161	A	$68.49	63,773	D
Common Stock	03/04/2015		M		1,400	A	$72.44	65,173	D
Common Stock	03/04/2015		S		12,824	D	$105	52,349	D

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)	$29.6	03/04/2015		M			3,018	09/14/2012(1)	09/14/2018	Common Stock	3,018	$0.0	9,050	D
Employee Stock Option (right to buy)	$38.63	03/04/2015		M			2,765	05/16/2013(2)	05/16/2019	Common Stock	2,765	$0.0	13,829	D
Employee Stock Option (right to buy)	$43.11	03/04/2015		M			3,480	09/06/2013(3)	09/06/2019	Common Stock	3,480	$0.0	24,362	D
Employee Stock Option (right to buy)	$68.49	03/04/2015		M			2,161	08/14/2014(4)	08/14/2020	Common Stock	2,161	$0.0	21,610	D
Employee Stock Option (right to buy)	$72.44	03/04/2015		M			1,400	08/14/2014(5)	11/13/2020	Common Stock	1,400	$0.0	13,077	D

Explanation of Responses:

1. The option vested 25% one year from the grant date of 9/14/2011, and an additional 6.25% vested at the end of each three-month period through 12/14/2014. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/14/2015.

2. The option vested 25% one year from the grant date of 5/16/2012, and an additional 6.25% vested at the end of each three-month period through 2/16/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 5/16/2016.

3. The option vested 25% one year from the grant date of 9/6/2012, and an additional 6.25% vested at the end of each three-month period through 12/6/2014. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/6/2016.

4. The option vested 25% one year from the grant date of 8/14/2013, and an additional 6.25% vested at the end of each three-month period through 2/14/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 8/14/2017.

5. The option vested 25% on 8/14/2014 and an additional 6.25% vested at the end of each three-month period through 2/14/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 8/14/2017.

	By: /s/ Sandra Garcia Attorney-in-Fact For: James J. Murphy	03/05/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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