Cavalry Storage CAXM Green Series 1 TB 5400-7200 RPM USB/eSATA External Hard Drive CAXM3G01T0 - Includes eSATA Kit Plug and play for Windows Vista/XP/2000 eSATA (3.0 Gbps transfer speed) USB 2.0 (480Mbps transfer speed) Unit Includes - One (1) year manufacturer's warranty, 3.5-inch hard drive in a single bay aluminum enclosure, eSATA cable, eSATA bracket System Requirements - Available USB port, Mac OS 9.x or newer (cannot use OTB feature), Windows 98SE / Me / 2000 / XP / Vista