12 bay nas memory capacity 48 tb number of installed hard drives 12 max hard drives 12 memory capacity per hard drive 4 tb hard drive types hdd ssd internal interface sata ii target audiences small and medium sized businesses smbs business internal file system btrfs external file systems ext3 ext4 fat32 hfs raid levels 0 1 5 6 10 5 jbod networking gigabit 101001000 connections 2x esata 1x usb 20 2x usb 30 4x rj 45 cases 2u rack mount