USB 2.0+ Firewire 1394 Combo Enclosure for 3.5-inch SATA Hard Drive up to 2.0 TB Large Storage Support up to 2.0 TB with 2.0A Power Supply FireWire (IEEE 1394a) ports supports data transfer rate up to 400 Mpbs (no daisy chain) USB 2.0 port supports High speed data transfer up to 480Mpbs Compatible OS: Windows 98SE/2000/ME/XP/2003/Vista/7/8.x/10, Mac OS 8.6 or above, Linux Better vantilation design with a built-in Fan