250GB 3.5" External Mammoth Drv USB 2.0/IDE Compliant: Integrated USB Transceiver Compatible with 1394-1995 and 1394A Phys Transfer Rate for High-speed IEEE1394 Interface: up to 400 Mbps USB 2.0 Transfer Rates up to 440 Mbps Easy Installation Support: Windows 98SE; Windows Me/2000/XP, Linux and Mac OS (without driver)