Amazon offers the Drobo 5N 5-Bay Network Attached Storage Array, model no. DRDS4A21, for $449.99 with free shipping. That's $20 under our mention from four weeks ago and the best price we've seen. (It's a current price low by $109). This enclosure can support up to five 3.5" serial ATA hard drives or SSD drives plus one mSATA (not included) for a maximum capacity of 20TB. It features Gigabit Ethernet, RAID support, and BeyondRAID technology, which chooses the correct protection algorithm based on data availability needs and allows switching from single to dual disk redundancy with a single click. A 6-foot Ethernet cable is also included.