Specification: HDD Support: 3.5擧ard Disk Model:3.5K Chipset: USB2.0桮L811-E PL2506 Size: 19.2*13.4*3.68 cm Interface: USB B-type receptacle Traansfer Rate: USB2.0 480Mbps OS Support: Microsoft Windows 98/SE/ME/2000/XP Mac OS8.6 +