Adorama offers the Drobo 5N 5-Bay Network Attached Storage Array, model no. DRDS4A21, for $524. Coupon code "SPE072214" cuts it to $427.50. With free shipping, that's the lowest total price we could find by $53, although we saw it for $28 less last month. This enclosure can support up to five plus one mSATA hard drives (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. Coupon expires July 23.

Also available is the Drobo 5D 5-Bay USB 3.0/Thunderbolt Storage Array, model no. DRDR5A21, for $664.99 before the above coupon, $579.99 after. (Click through to Adorama to see this offer.) With free shipping, that's another price low by $34. It can hold up to five SATA hard drives or solid state drives, as well as one mSATA SSD in the accelerator bay. It also features a USB 3.0 port plus two Thunderbolt ports (for daisy-chaining Thunderbolt devices).