Western Digital 1TB SATA II 3.5 Inch High Speed Internal Hard drive 1 TB 3.5-inch SATA hard drive; high-performance, energy-saving solution for desktop PCs and external storage devices 16 MB buffer cache; 3 Gb/s transfer rate IntelliPower for efficient performance; IntelliSeek for lower power consumption, noise and vibration; IntelliPark reduces aerodynamic drag; Perpendicular Magnetic Recording for greater areal density 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 video; 100 hours HD video 3-year limited manufacturer's warranty