Cavalry Storage CAUM-B Series External Hard Drive (CAUM3701T0-OTB-B) Plug-and-Play for Windows PCs USB 2.0 (480Mbps transfer speed) It has 32 MB Cache Unit includes one (1) year manufacturer's warranty, 3.5-inch hard drive in a single bay aluminum enclosure, USB cable, stand 32 MB Cache 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, USB cable, stand System Requirements - Available USB port, Mac OS 9.x or newer (cannot use OTB feature), Windows 98SE / Me / 2000 / XP / Vista