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 ii target audience home users external file systems ntfs fat32 fat raid levels 0 1 big networking gigabit 101001000 connections 2x usb 20 1x rj 45 case tower optical disc drives without protocols bittorrent ftp upnp webdav dyndns server service print server