X0202 4 2007-07-31 1 0000106040 WESTERN DIGITAL CORP WDC 0001232829 BUKATY RAYMOND M C/O WESTERN DIGITAL CORPORATION 20511 LAKE FOREST DRIVE LAKE FOREST CA 92630-7741 0 1 0 0 Sr VP, Admin, Gen Cnsl & Secty Common Stock 2007-07-31 4 F 0 30225 21.35 D 148453 D Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). Includes 9 shares and 1,671 shares acquired under the issuer's Employee Stock Purchase Plan on November 30, 2006 and May 31, 2007 respectively. Exhibit List: Exhibit 24 - Power-of-Attorney By: /s/ Van Huynh Attorney-in-Fact For: Raymond M. Bukaty 2007-08-01