External Ports: USB 3.2 Gen 1 Type B Maximum Internal Raw Capacity: 72TB (4x 18TB HDD) Drive Bays: 4x 2½"/3½" SATA III Dimensions(HxWxD): 185.5x170x230 mm Weight: 2.7kg/5.95lbs Disk Tray Lock: Yes Front Panel LED: Power, Status, Link, Alert, HDD Power Supply: 90W AC Adapter Volume Type: Single, JBOD, RAID 0/1/5/6/10,RAID 1/5+Hot Spare