Cavalry Storage CADA-U32A Series 1 TB USB 2-bay RAID Personal Disk Array CADA001U32A USB 2.0 (USB 1.1 backwards compatible) 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 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, AC adapter, Resources CD and Quick Start Guide System Requirements - Available USB port, Mac OS 9.x or newer, Windows 98SE / Me / 2000 / XP / Vista