Western Digital Caviar Green 1 TB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 5400 RPM SATA II WD10EACS Ships in Certified Frustration-Free Packaging IntelliPower- efficient performance; IntelliSeek- lower power consumption, noise and vibration; IntelliPark reduces aerodynamic drag Holds 285,000 digital photos; 250,000 MP3 files; 25,000 uncompressed songs; 76 hours digital video; 400 hours DVD-quality video; Holds up to 285,000 digital photos; 250,000 MP3 files; 25,000 uncompressed CD-quality songs; 76 hours digital video; 400 hours DVD-quality