Western Digital Corporation 20511 Lake Forest Drive Lake Forest, California 92630 Tel: 949.672.7000

EXHIBIT 10.18.1

Western Digital Corporation
00000 Xxxx Xxxxxx Xxxxx
Xxxx Xxxxxx, Xxxxxxxxxx 00000
Tel: 000.000.0000

February 16, 2006

Xx. Xxxxxxx Xxxxxxxx
00000 Xxxx Xxxxxx Xxxxx
Xxxx Xxxxxx, XX 00000

Dear Hossein:

     When countersigned by you below, this letter shall constitute our agreement that the entire Performance Share Award (grant number PS050005) granted by Western Digital Corporation (the “Company”), to you on May 19, 2005, in accordance with that certain Notice of Grant of Performance Share Awards and Performance Share Award Agreement, dated on or about May 19, 2005, is hereby terminated and you have no further rights with respect to, or in respect of, such Performance Share Award.

     This letter agreement, which is entered for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, shall be interpreted and construed in accordance with the laws of the State of Delaware (without regard to conflict of law principles) and applicable federal law. This letter agreement constitutes the entire agreement and supersedes all prior understandings and agreements, written or oral, of the parties hereto with respect to the subject matter hereof.

		Very truly yours,
		Western Digital Corporation
		By:		/s/ Xxxxxxx X. Xxxxxx
				Xxxxxxx X. Xxxxxx
				Senior Vice President, Administration, General Counsel and Secretary

Agreed to and Accepted by:

/s/ Xxxxxxx Xxxxxxxx

Xxxxxxx Xxxxxxxx