Toshiba MK3259GSXP. Hard drive capacity: 320 GB, Hard drive interface: Serial ATA, Hard drive speed: 5400 RPM. Power consumption (typical): 1.85 W, Power consumption (standby): 0.18 W, Power consumption (read): 1.5 W. Width: 2.75" (69.8 mm), Height: 0.374" (9.5 mm), Depth: 3.94" (100 mm). Data transfer rate: 3 Gbit/s, Supported data transfer rates: 584 MBit/s - 1195 MBit/s