4 bay nas memory capacity 8 tb number of installed hard drives 4 max hard drives 4 memory capacity per hard drive 2 tb hard drive form factor 35 inch hard drive type hdd hard drive mounting pull out tray 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 fat hfs ext2 raid levels 0 1 5