Cavalry Storage CADA-SA2 Series 1 TB USB/eSATA 2-bay RAID Personal Disk Array (Black) CADA001SA2-B - Includes eSATA Kit USB 2.0 (USB 1.1 backwards compatible) and eSATA interface Plug and play for Windows 2000 and newer (pre-formatted to NTFS), preconfigured to RAID 1 (mirrored, total usable capacity is halved in RAID 1) Configurable to RAID 0, 0+1 and 1 Unit Includes - One (1) year manufacturer's warranty, two (2) 500 GB 3.5-inch hard drives installed in a dual bay enclosure with built-in fan, USB cable, eSATA cable, eSATA bracket, AC adapter, Resources CD and Quick Start Guide System Requirements - Available USB port or eSATA port, Windows 98SE / Me / 2000 / XP / Vista