6 bay nas memory capacity 18 tb number of installed hard drives 6 max hard drives 6 memory capacity per hard drive 3 tb internal interface sata target audience small and medium sized businesses smbs raid levels 0 1 5 6 10 50 jbod networking thunderbolt 2 connections 2x thunderbolt 2 case tower optical disc drives without hdd management hot swap server services photo album server itunes server network video monitoring upnp media server data back