Cavalry Storage CAXP Series 500 GB USB 2.0/eSATA Portable External Hard Drive CAXP25500 Plug & play for Windows Vista/XP/2000 USB 2.0 (480Mbps transfer speed) eSATA (3.0 Gbps transfer speed) Unit Includes - One (1) year manufacturer's warranty, 2.5-inch hard drive in an aluminum enclosure, eSATA cable, USB cable, Quick Start Guide and Resources CD System Requirements - Available USB or eSATA port, Mac OS 9.x or newer, Windows 98SE / Me / 2000 / XP / Vista