WD 320 GB USB/Firewire External Hard Drive with Dual Option Backup Features high-performance 7200 RPM drive Plugs it into your PC through via USB 2.0 or FireWire port Includes a six-foot fire-wire cable, USB cable, and AC power cord, Stackable compact shock-absorbent design measures a mere 1.7 x 6.1 x 8.6-inches (HxWxL) Hold up to 91,445 digital photos; 80,015 MP3 songs; 8,001 uncompressed CD quality songs; 25 hours of Digital Video