WD  250GB SATA Notebook Hard Drive (Retail package) Massive capacity - Whether they are in an external drive or a notebook computer Fast and efficient - With 5400 RPM spin speed and 12 ms access time Quiet - In a notebook drive, silence is golden. Reliable and Rugged - WD&apos;s ShockGuard technology protects the drive mechanics and platter surfaces from shocks. Tested for Compatibility