Hitachi Deskstar 5K1000 320GB, Deskstar. Hard drive capacity: 320 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 7200 RPM. Weight: 400 g, Height: 147 mm, Width: 26.1 mm. Operating temperature range (T-T): 0 - 60 °C, Storage temperature range (T-T): -40 - 70 °C, Operating relative humidity range: 8 - 90 %