4 bay nas memory capacity 12 tb max hard drives 4 hard drive form factors 25 35 inch hard drive types hdd ssd hard drive location vertical internal interface sata iii target audience small and medium sized businesses smbs internal file system ext4 external file systems ext3 ext4 ntfs fat32 hfs raid levels 0 1 5 6 10 networking gigabit 101001000 connections 2x rj 45 2x hdmi 14a 5x usb 30 positions of connectivity ports 1x usb front 2x