Hitachi Deskstar T7K500 320GB SATA-II, Deskstar. Hard drive capacity: 320 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA II. Weight: 640 g, Height: 26.1 mm, Width: 101.6 mm. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -40 - 65 °C, Operating relative humidity range: 8 - 90 %