Freecom Classic SL Hard Drive 320 GB, Classic SL. Hard drive capacity: 320 GB, Hard drive interface: USB 2.0, Hard drive size: 88.9 mm (3.5 "). Weight: 0.75 kg, Width: 115 mm, Depth: 215 mm. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -40 - 65 °C. Average latency: 4.2 ms, Hard disk transfer rate: 480 Mbit/s, Mean time between failures (MTBF): 50000 h. Package dimensions (WxDxH): 210 x 305 x 106 mm