Ownership Submission
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 *
FINKBEINER MARTIN W.
  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)
EVP Operations
(Last)
(First)
(Middle)
C/O WESTERN DIGITAL CORPORATION, 20511 LAKE FOREST DRIVE
3. Date of Earliest Transaction (Month/Day/Year)
12/02/2009
(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 12/02/2009   M   60,000 A $ 12.84 136,895 (1) D  
Common Stock 12/02/2009   M   9,035 A $ 8.01 145,930 D  
Common Stock 12/02/2009   M   6,462 A $ 24.18 152,392 D  
Common Stock 12/02/2009   M   3,000 A $ 3.85 155,392 D  
Common Stock 12/02/2009   S   78,497 D $ 39.0331 (2) 76,895 D  
Common Stock 12/03/2009   M   965 A $ 8.01 77,860 D  
Common Stock 12/03/2009   M   60,000 A $ 8.89 137,860 D  
Common Stock 12/03/2009   S   60,965 D $ 39.0441 (3) 76,895 D  

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 12/02/2009   M     3,000 09/23/2003(4) 09/23/2012 Common Stock 3,000 $ 0 0 D  
Employee Stock Option (right to buy) $ 8.01 12/02/2009   M     9,035 09/03/2005(4) 09/03/2014 Common Stock 9,035 $ 0 965 D  
Employee Stock Option (right to buy) $ 8.01 12/03/2009   M     965 09/03/2005(4) 09/03/2014 Common Stock 965 $ 0 0 D  
Employee Stock Option (right to buy) $ 8.89 12/03/2009   M     60,000 11/09/2005(4) 11/09/2014 Common Stock 60,000 $ 0 0 D  
Employee Stock Option (right to buy) $ 12.84 12/02/2009   M     60,000 10/24/2004(4) 10/24/2013 Common Stock 60,000 $ 0 0 D  
Employee Stock Option (right to buy) $ 24.18 12/02/2009   M     6,462 02/17/2007(5) 02/17/2016 Common Stock 6,462 $ 0 431 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
FINKBEINER MARTIN W.
C/O WESTERN DIGITAL CORPORATION
20511 LAKE FOREST DRIVE
LAKE FOREST, CA 92630-7741
      EVP Operations  

Signatures

 By: /s/ Sandra Garcia Attorney-in-Fact For: Martin W. Finkbeiner   12/04/2009
**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) Includes 2,891 shares acquired under the issuer's Employee Stock Purchase Plan on November 30, 2009.
(2) Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $39 to a high of $39.19. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
(3) Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $39 to a high of $39.17. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
(4) The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.
(5) The option vested 25% one year from the grant date of 2/16/2006, and an additional 6.25% vested at the end of each three-month period through 11/16/2009. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 2/16/2010.

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