Removable hard disk system memory capacity 6 tb hard disc capacity installed 3 tb max capacity 12 tb number of installed hard drives 2 max hard drives 2 hard drive types hdd hot swap drive bay 35 inches external interfaces usb 30 2x thunderbolt 2 internal interface sata iii sata 600 colour silver raid levels 0 1 jbod power supply external mains adapter case freestanding weight 3 kg