4 bay nas memory capacity 16 tb number of installed hard drives 4 max hard drives 4 memory capacity per hard drive 4 tb hard drive form factors 25 35 inch hard drive types hdd ssd internal interface sata iii target audiences home users small office home office soho internal file system ext4 external file systems ext3 ext4 ntfs fat32 hfs raid levels 0 1 5 6 10 5 jbod networking gigabit 101001000 connections 1x esata 3x usb 30 2x rj 4