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) 03/06/2018 (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 03/06/2018   A   134,172 (1) A $ 0 218,089 D   Common Stock 03/07/2018   M   848 (2) A $ 0 218,937 D   Common Stock 03/07/2018   F   4,307 (3) D $ 95.27 214,630 D

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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

(4)

03/06/2018

A

4,147.4153

(4)

(4)

Common Stock

4,147.4153

$ 0

12,530.754

D

Dividend Equivalent Rights

(2)

03/07/2018

M

848.0266

(2)

(2)

Common Stock

848.0266

$ 0

11,682.7274

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		03/08/2018
**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)	Represents stock units that have been earned by the Reporting Person as payment in respect of the vesting of performance-based restricted stock units. Of these shares 10,485 vested on March 7, 2018 and 123,687 will vest on March 7, 2019.
(2)	Represents dividend equivalents that 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 $2.53 was also paid to the Reporting Person to settle a fractional dividend equivalent of 0.0266.
(3)	Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
(4)	The dividend equivalents accrued in connection with a determination that the performance-based restricted stock units to which the dividend equivalents relate were achieved at a level greater than target.

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