Western Digital 320GB Scorpio Black with Free Fall Sensor SATA 7200 RPM 2.5IN 16MB WD3200BJKT Bulk/OEM Hard Drive WD3200BJKT 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. 320 GB capacity holds up to 64,000 digital photos, 80,000 MP3 files, and up to 38 hours of HD video. 5 year limited warranty. Ships in Certified Frustration-Free Packaging Scorpio 320 GB, 16 MB Cache, 7200 RPM Internal Hard Micro-hard-drives 500 GB Samurai USB/eSATA Port; SD500USE WD Scorpio Black 7200 RPM SATA 2.5" hard drives from Western Digital deliver desktop-class performance, power efficiency for long battery life 320 GB capacity holds up to 64,000 digital photos, 80,000 MP3 files, and up to 38 hours of HD video. 5 year limited warranty. Capacities up to 320 GB. 7200 RPM and 16MB cache deliver desktop performance for your laptop.