FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * MILLIGAN STEPHEN D   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) Senior VP & CFO (Last) (First) (Middle) C/O WESTERN DIGITAL CORPORATION, 20511 LAKE FOREST DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 04/30/2007 (Street) LAKE FOREST, CA 92630-7741 4. If Amendment, Date 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 (City) (State) (Zip) 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 04/30/2007   S   5,334 D $ 17.87 269,058 D   Common Stock 04/30/2007   S   5,000 D $ 17.84 264,058 D   Common Stock 04/30/2007   S   5,000 D $ 17.82 259,058 D   Common Stock 05/01/2007   M   19,593 A $ 3.85 278,651 D   Common Stock 05/01/2007   M   23,438 A $ 9.7 302,089 D   Common Stock 05/01/2007   M   18,750 A $ 13.07 320,839 D   Common Stock 05/01/2007   M   16,876 A $ 10.21 337,715 D   Common Stock 05/01/2007   S   11,000 D $ 17.6 326,715 D   Common Stock 05/01/2007   S   30,000 D $ 17.61 296,715 D   Common Stock 05/01/2007   S   12,657 D $ 17.62 284,058 D   Common Stock 05/01/2007   S   20,000 D $ 17.63 264,058 D   Common Stock 05/01/2007   S   18,000 D $ 17.64 246,058 D   Common Stock 05/01/2007   S   10,000 D $ 17.65 236,058 D   Common Stock 05/01/2007   S   10,000 D $ 17.66 226,058 D   Common Stock 05/01/2007   S   5,000 D $ 17.67 221,058 D   Common Stock 05/01/2007   S   5,000 D $ 17.69 216,058 D   Common Stock 05/01/2007   S   5,000 D $ 17.7 211,058 D   Common Stock 05/01/2007   S   5,000 D $ 17.71 206,058 D   Common Stock 05/01/2007   S   5,000 D $ 17.72 201,058 D   Common Stock               776 I by Trust 401(K)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

05/01/2007

M

19,593

09/23/2003(1)

09/23/2012

Common Stock

19,593

$ 0

0

D

Employee Stock Option (right to buy)

$ 9.7

05/01/2007

M

23,438

07/30/2004(2)

07/30/2013

Common Stock

23,438

$ 0

4,687

D

Employee Stock Option (right to buy)

$ 10.21

05/01/2007

M

16,876

01/20/2006(3)

01/20/2015

Common Stock

16,876

$ 0

23,624

D

Employee Stock Option (right to buy)

$ 13.07

05/01/2007

M

18,750

09/24/2004(4)

09/24/2013

Common Stock

18,750

$ 0

7,500

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MILLIGAN STEPHEN D C/O WESTERN DIGITAL CORPORATION 20511 LAKE FOREST DRIVE LAKE FOREST, CA 92630-7741			Senior VP & CFO

Signatures

By: /s/ Sandra Garcia Attorney-in-Fact For: Stephen D. Milligan		05/02/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.
(2)	The option vested 25% one year from the grant date of 7/30/2003, and an additional 6.25% vested at the end of each three-month period through 4/30/2007. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 7/30/2007.
(3)	The option vested 25% one year from the grant date of 1/20/2005, and an additional 6.25% vested at the end of each three-month period through 4/20/2007. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 1/20/2009.
(4)	The option vested 25% one year from the grant date of 9/24/2003, and an additional 6.25% vested at the end of each three-month period through 3/24/2007. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/24/2007.

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