Tray less design makes switching drives fast and tool-free - installs in any 5.25" drive bay. Easily switch drives without opening computer case in order to move large files from one system to another or run multiple OS on same system. Fully Serial ATA compatible - supports up to 3Gb/sec (300MB/sec) data transfer rates. Durable and high-quality metal construction. Easy access handle for quick removal. Includes lock to prevent accidental removal and extra security. Front LED to indicate power and HDD operation. Rear mounted ball-bearing fan keeps drive cool. Requires no driver - works with Windows 98 / ME / 2000 / XP / Server 2003 and 2008 / Vista and virtually any system with an existing Serial ATA controller.