HGST He8, Ultrastar. Hard drive capacity: 8000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (typical): 7.4 W, Power consumption (idle): 5.1 W. Width: 4" (101.6 mm), Height: 1.03" (26.1 mm), Depth: 5.79" (147 mm)