WD® COMPLETES ACQUISITION OF HOYA’S MAGNETIC MEDIA OPERATIONS

LAKE FOREST, Calif. – June 30, 2010 – Western Digital Corp. (NYSE: WDC) announced today that it has completed the previously announced acquisition of the magnetic media sputtering operations of Hoya Corporation and Hoya Magnetics Singapore Pte. Ltd. for approximately $233 million. The acquisition will support anticipated growth in hard drive demand.

WD® has acquired the facilities, equipment, intellectual property and working capital of Hoya’s media sputtering operations, based in Tuas, Singapore, as well as certain related equipment at Hoya’s Nagasaka, Japan, research and development facilities. A multi-year commitment of Hoya glass substrate supply related to these operations was included in the agreement.