A 320 GB Scorpio

WD® SHIPS 320 GB CAPACITY 2.5-INCH HARD DRIVES FOR NOTEBOOKS AND PORTABLE STORAGE DEVICES

WD’s Continued Investments in Technology Result in Capacity Leadership for the Mobile Market

LAKE FOREST, Calif. – October 31, 2007 – Western Digital Corp. (NYSE: WDC) today announced it is now shipping its new WD Scorpio® 320 GB 2.5-inch SATA (Serial ATA) hard drives for notebook computers and portable storage devices.

WD uses advanced head and media technology to achieve the world’s highest capacity 2.5-inch, slim, 9.5mm form-factor hard drive and includes proprietary features that make the drive extraordinarily quiet while running at cool operating temperatures. The WD Scorpio 320 GB hard drives deliver high performance with 3 Gb/s transfer rate and are destined for use in OEM notebook platforms that offer the highest storage capacities to the worldwide market.

“Consumer demands for high capacity storage are stronger than ever. WD is again leading the industry by delivering high quality, high capacity product to the market with the introduction of its new WD Scorpio 320 GB hard drive,” said Campbell Kan, vice president of mobile computing business unit, Acer Inc. “WD understands the increasing storage requirements of the notebook market, allowing Acer to introduce high-capacity notebook solutions that meet our customer’s ever-growing demands.”

“In today’s market, new notebook systems are increasingly targeting heavy duty applications in the office and home,” said Jim Morris, WD’s vice president and general manager of notebook storage. “As system manufacturers improve performance and add data hungry features, high-capacity hard drives become a key ingredient that allows users to fully benefit from the latest computing technologies.”