ZyXEL NSA221 2-Bay Network Attached Storage and Media Server for $79.99 shipped. Here is a screenshot for reference. It features up to 4TB capacity, zPilot for media auto-classification with drag-and-drop, runs eMule/BitTorrent/FTP/HTTP downloads independent of PC, and is DLNA 1.5-certified to be compatible to other media devices. Most places have it for about 106.