4 bay nas memory capacity 4 tb number of installed hard drives 4 max hard drives 4 memory capacity per hard drive 1 tb hard drive form factors 25 35 inch hard drive types hdd ssd hard drive access front internal interface sata iii target audiences small office home office soho small and medium sized businesses smbs raid levels 0 1 5 10 networking gigabit 101001000 connections 1x esata 1x usb 20 2x usb 30 2x rj 45 case tower processors