2 bay nas max hard drives 2 hard drive form factors 25 35 inch hard drive type hdd 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 btrfs ext4 external file systems ext3 btrfs ext4 ntfs hfs fat raid levels 0 1 5 10 jbod networking gigabit 101001000 connections 3x usb 30 1x esata 2x rj 45 case