I can't think of another product category less served by the ol' "world's smallest" tag that gadget-makers continuously foam over than network storage drives. But, of course, here we have the "world's smallest" NAS.
This Thecus N5200 Network Attached Storage (NAS) can hold a lot of stuff. With five drives of 750GB each, that's—carry the two—3.75 Terabytes of
data! Not only does it have 5 drives internally, there's an eSATA port on the back for expandability.