Western Digital 160 GB Scorpio Black SATA 7200 RPM 16 MB Cache Bulk/OEM Notebook Hard Drive With Drop Sensor WD1600BJKT WD Scorpio Black 7200 RPM SATA 2.5-inch hard drives from Western Digital deliver desktop-class performance and power efficiency for longer battery life. Capacities up to 320 GB. Free-fall sensor - As an added layer of protection, if the drive is dropped while in use, WD's free-fall sensor detects that the drive is falling and, in less than 200 milliseconds, parks the head to help prevent damage and data loss. 7200 RPM and 16MB cache deliver desktop performance for your laptop. 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. Ships in Certified Frustration-Free Packaging 500 GB 7200 RPM SATA Sureillance 7200 RPM and 16MB cache deliver desktop performance for your laptop. 160 GB capacity holds up to 32,000 digital photos, 40,000 MP3 files, and up to 19 hours of HD video.