HGST 7K4000, Deskstar. Hard drive capacity: 4000 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 7200 RPM. Power consumption (idle): 6.9 W, Input voltage: 5/12 V, Start-up current: 2 A. Weight: 0.69 kg, Height: 26.1 mm, Width: 101.6 mm. Operating temperature range (T-T): 5 - 60 °C, Storage temperature range (T-T): -40 - 70 °C, Operating relative humidity range: 8 - 90 %