12 bay nas max hard drives 12 hard drive form factors 25 35 inch 2535 disk drive slots 8 25 disk drive slots 4 hard drive types hdd ssd hard drive mounting removable drive hard drive access front 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 jbod networking 10 gigabit thu