WD Black 160 GB Mobile Hard Drive: 2.5 Inch, 7200 RPM, SATA II, 16 MB Cache, 5 Year Warranty - WD1600BEKT Ships in Certified Frustration-Free Packaging 7200 RPM SATA 2.5-inch hard drives from Western Digital deliver desktop-class performance and power efficiency. Capacity: up to 500 GB. 7200 RPM and 16MB cache deliver desktop performance for your laptop. IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration. 160 GB capacity holds up to 32,000 digital photos, 40,000 MP3 files, and up to 19 hours of HD video. 5 year limited warranty. WD Scorpio Black 7200 RPM SATA 2.5-inch hard drives from Western Digital deliver desktop-class performance & power efficiency for longer battery life. Capacities up to 500 GB. Ships in Certified Frustration-Free Packaging