4 bay nas memory capacity 16 tb max hard drives 4 hard drive form factors 25 35 inch hard drive types hdd ssd hard drive mounting removable drive hard drive access front hard drive location vertical 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 5spare jbod single disk networking gigabit 101001000 co