HGST Z5K320, Travelstar. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA, Hard drive speed: 5400 RPM. Power consumption (standby): 0.1 W, Power consumption (read): 1.66 W, Power consumption (write): 1.66 W. Width: 2.76" (70 mm), Height: 0.276" (7 mm), Depth: 3.94" (100 mm). Hard disk transfer rate: 994 Mbit/s, Power requirements: +5VDC, Color of product: Black