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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1. Name and Address of Reporting Person * MASSENGILL MATTHEW E   2. Issuer Name and Ticker or Trading Symbol WESTERN DIGITAL CORP [WDC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman of the Board (Last) (First) (Middle) C/O WESTERN DIGITAL CORPORATION, 20511 LAKE FOREST DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 01/31/2006 (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 01/31/2006   M   121,000 A $ 10.21 671,950 D   Common Stock 01/31/2006   M   85,400 A $ 10.25 757,350 D   Common Stock 01/31/2006   M   10,000 A $ 10.25 767,350 D   Common Stock 01/31/2006   M   6,784 A $ 12.25 774,134 D   Common Stock 01/31/2006   M   40,000 A $ 12.875 814,134 D   Common Stock 01/31/2006   M   11,500 A $ 11.875 825,634 D   Common Stock 01/31/2006   S   12,000 D $ 21.75 813,634 D   Common Stock 01/31/2006   S   1,700 D $ 21.76 811,934 D   Common Stock 01/31/2006   S   38,300 D $ 21.77 773,634 D   Common Stock 01/31/2006   S   8,800 D $ 21.78 764,834 D   Common Stock 01/31/2006   S   15,300 D $ 21.79 749,534 D   Common Stock 01/31/2006   S   71,000 D $ 21.8 678,534 D   Common Stock 01/31/2006   S   16,200 D $ 21.81 662,334 D   Common Stock 01/31/2006   S   40,700 D $ 21.82 621,634 D   Common Stock 01/31/2006   S   32,084 D $ 21.83 589,550 D   Common Stock 01/31/2006   S   3,900 D $ 21.84 585,650 D   Common Stock 01/31/2006   S   17,300 D $ 21.85 568,350 D   Common Stock 01/31/2006   S   900 D $ 21.86 567,450 D   Common Stock 01/31/2006   S   800 D $ 21.87 566,650 D   Common Stock 01/31/2006   S   6,800 D $ 21.88 559,850 D   Common Stock 01/31/2006   S   7,500 D $ 21.89 552,350 D   Common Stock 01/31/2006   S   1,400 D $ 21.9 550,950 D   Common Stock               4,008 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)

$ 10.21

01/31/2006

M

121,000

01/20/2006(1)

01/20/2015

Common Stock

121,000

$ 0

191,500

D

Employee Stock Option (right to buy)

$ 10.25

01/31/2006

M

85,400

09/09/2000(2)

09/09/2008

Common Stock

85,400

$ 0

10,000

D

Employee Stock Option (right to buy)

$ 10.25

01/31/2006

M

10,000

09/09/1999(3)

09/09/2008

Common Stock

10,000

$ 0

0

D

Employee Stock Option (right to buy)

$ 11.875

01/31/2006

M

11,500

07/24/1997(3)

07/24/2006

Common Stock

11,500

$ 0

4,500

D

Employee Stock Option (right to buy)

$ 12.25

01/31/2006

M

6,784

08/06/2005(4)

08/06/2008

Common Stock

6,784

$ 0

0

D

Employee Stock Option (right to buy)

$ 12.875

01/31/2006

M

40,000

11/17/1999(3)

11/17/2008

Common Stock

40,000

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MASSENGILL MATTHEW E C/O WESTERN DIGITAL CORPORATION 20511 LAKE FOREST DRIVE LAKE FOREST, CA 92630-7741	X		Chairman of the Board

Signatures

By: /s/ Sandra Garcia Attorney-in-Fact For: Matthew E. Massengill		02/01/2006
**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)	A total of 125,000 shares vested one year from the grant date of 1/20/2005. An additional 93,750 shares subject to the option will vest in substantially equal installments at the end of each three-month period until 10/20/2006. The remaining shares subject to the option will vest on 1/1/2007.
(2)	The option vested 5% 2 years from the grant date, 15% 3 years from the grant date, 30% 4 years from the grant date, and the final 50% 5 years from the grant date.
(3)	The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.
(4)	The option vested 100% seven years from the grant date.

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