5 bay nas memory capacity 20 tb number of installed hard drives 5 max hard drives 5 memory capacity per hard drive 4 tb hard drive form factor 35 inch hard drive types hdd ssd internal interface sata iii target audiences small office home office soho small and medium sized businesses smbs internal file system hfs ntfs raid levels 0 1 10 5 6 50 60 jbod networking thunderbolt connections 1x usb 30 2x thunderbolt case tower optical disc dr