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 * LONG MARK P   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) Pres WD Capital, CSO & CFO (Last) (First) (Middle) C/O WESTERN DIGITAL CORPORATION, 5601 GREAT OAKS PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 08/03/2017 (Street) SAN JOSE, CA 95119 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 08/03/2017   M   108 (1) A $ 0 90,683 D   Common Stock 08/03/2017   F   2,083 (2) D $ 84.51 88,600 D   Common Stock 08/04/2017   M(3)   17,867 A $ 44.78 106,467 D   Common Stock 08/04/2017   S(3)   19,777 D $ 84.4972 (4) 86,690 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

Dividend Equivalent Rights

(1)

08/03/2017

M

108.3671

(1)

(1)

Common Stock

108.3671

$ 0

6,427.9075

D

Employee Stock Option (right to buy)

$ 44.78

08/04/2017

M(3)

17,867

08/03/2017(5)

08/03/2023

Common Stock

17,867

$ 0

53,599

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LONG MARK P C/O WESTERN DIGITAL CORPORATION 5601 GREAT OAKS PARKWAY SAN JOSE, CA 95119			Pres WD Capital, CSO & CFO

Signatures

By: /s/ Sandra Garcia Attorney-in-Fact For: Mark Long		08/07/2017
**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 dividend equivalents were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalents relate. A cash amount equal to $31.02 was also paid to the holder to settle a fractional dividend equivalent of 0.3671.
(2)	Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
(3)	These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 16, 2017.
(4)	Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $84.08 to a high of $84.80. 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.
(5)	The option vested 25% one year from the grant date of 8/3/2016. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 8/3/2020.

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