Seagate Technology 200 GB USB 2.0 and FireWire External Drive (ST3200823A-RK) Connectivity with USB 2.0 and Firewire IEEE 1394 7200 RPM,Compatible with PC and Macintosh computers Dimensions: 7.2" Depth x 6.5" Width x 2.25" Height Average seek time: 8.5 milliseconds