Iogear 2.5" USB 2.0 40 GB Hard Drive ION-Drive (GHD225U40) USB 2.0 interface, supporting high speed data transfer rates of up to 480 Mbps Backward compatible with USB 1.1 specifications Fully compatible with IDE ATA-2 and ATA-5 peripheral devices Hot swappable, Hot pluggable, Plug-n-Play Compatible with Windows 98SE, 2000, ME, XP; Mac OS X or greater and Mac OS 8.6 - 9.0 (USB 1.1) Mac OS 8.6 - 9.0 (USB 1.1)