2 bay nas memory capacity 4 tb number of installed hard drives 2 max hard drives 2 memory capacity per hard drive 2 tb internal interface sata iii target audience home users raid level 1 networking gigabit 101001000 connections 1x rj 45 1x usb 20 1x usb 30 case portable display status without optical disc drives without server services file server upnp media server backup server data backup desktop backup cloud backup supported cloud services