Western Digital WD2500KS Caviar 250GB SATA 3.5-Inch Hard Drive Ultra-fast 250 GB SATA 3.5-inch hard drive with cool and quiet operation; ideal for Windows Vista machines 7,200 RPM spin speed; 16 MB cache; 3 Gbs transfer rate IntelliSeek technology for lower power consumption, noise and vibration; Data Lifeguard for data management and protection Holds up to 71,000 digital photos; 62,000 MP3 files; 6,200 uncompressed CD-quality songs; 19 hours digital video; 100 hours DVD-quality video; 30 hours HD video 3-year limited warranty