Cavalry Storage CAXM Series 500 GB USB/eSATA External Hard Drive CAXM37500 - Includes eSATA Kit eSATA kit included! USB 2.0 (USB 1.1 backwards compatible) and eSATA interface Plug and play for Windows 2000 and newer (pre-formatted to NTFS) Unit Includes - One (1) year manufacturer's warranty, 500 GB 3.5-inch hard drive in a single bay aluminum enclosure, USB cable, eSATA kit (eSATA cable and bracket), stand, and power adapter. System Requirements - Available USB or SATA port, Mac OS 9.x or newer, Windows 98SE / Me / 2000 / XP / Vista