The NAS 4220 supports two 3½" SATA drives in a RAID0, RAID1 or JBOD/Spanning configuration. The front panel houses the power switch, OS and HDD activity LED's and USB 2.0 dock. Any standard external USB hard drive enclosure or flash memory stick can be connected to the NAS 4220 and accessed via the OS through this port. There is also a small, unlabeled button that performs a one-touch backup of the connected USB device to the internal data storage.
The rear of the case has vents for the internal cooling fan, a Kensington lock slot, Gigabit Ethernet port, reset and reboot buttons, power jack and a second USB 2.0 port. In addition to attaching USB hard drives and memory sticks, the port can also be used to share a USB printer with other computers on the network. The NAS 4220 functions in a Windows, Mac OS X or Linux/Unix network environment, and can serve as an FTP or DHCP server as well as providing support for iTunes and Twonky media.
On to drive installation.