Got extra drives around and want a simple way to access them? This is you best option. In JBOD (Just a Bunch of Drives) mode, you can simple access your hard drive directly through the USB connection when you attach to your computer. Or you can add two drives and operate in RAID mode (See my second photo for specs). I moved to a formal NAS, so offering up my pair of Rosewill enclosures. All photos are my own of one of the two I have for sale (both are in similar, well cared-for condition) with original boxes and packing materials.