Iomega HDD 250 GB USB 2.0 External Desktop Hard Drive (33089) Hot plug-and-play Average seek time (read) - 9 milliseconds Transfer Rate - 25 Mbps in USB 2.0 Fast 7200 rpm Compatible with Windows 98, 98SE, 2000 Professional, Me, XP Home, XP Professional; MAC OS 8.6 or above with Mac OS USB version 1.3.3 or above