WESTERN DIGITAL CORP — Director's Dealing 2012

May 29, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2012-05-25

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-25	Common Stock	M	7387	$16.85	Acquired	82614	Direct
2012-05-25	Common Stock	M	7613	$23.78	Acquired	90227	Direct
2012-05-25	Common Stock	S	15000	$34.2407	Disposed	75227	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-25	Employee Stock Option (right to buy)	$16.85	M	7387	Disposed	2016-02-04	Common Stock (7387)	Direct
2012-05-25	Employee Stock Option (right to buy)	$23.78	M	7613	Disposed	2015-09-11	Common Stock (7613)	Direct

Footnotes

F1: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $34.24 to a high of $34.245. 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.

F2: The option vested 25% one year from the grant date of February 4, 2009, and an additional 6.25% vested at the end of each three-month period through May 4, 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 February 4, 2013.

F3: 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.