WESTERN DIGITAL CORP — Director's Dealing 2012

May 24, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2012-05-21

Reporting Person: MURPHY JAMES J (EVP, WWS & Sales Ops)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-21	Common Stock	S	732	$35.8315	Disposed	75227	Direct
2012-05-23	Common Stock	M	3052	$23.78	Acquired	78279	Direct
2012-05-23	Common Stock	M	3699	$23.46	Acquired	81978	Direct
2012-05-23	Common Stock	M	8249	$28.09	Acquired	90227	Direct
2012-05-23	Common Stock	S	15000	$33.98	Disposed	75227	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-23	Employee Stock Option (right to buy)	$23.46	M	3699	Disposed	2014-09-12	Common Stock (3699)	Direct
2012-05-23	Employee Stock Option (right to buy)	$23.78	M	3052	Disposed	2015-09-11	Common Stock (3052)	Direct
2012-05-23	Employee Stock Option (right to buy)	$28.09	M	8249	Disposed	2015-02-06	Common Stock (8249)	Direct

Footnotes

F1: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

F2: The option vested 25% one year from the grant date of 9/11/2008, and an additional 6.25% vested at the end of each three-month period through 3/11/2012. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/11/2012.