As one of its daily deals, Amazon offers the Drobo 5D 5-Bay USB 3.0/Thunderbolt Storage Array, model no. DRDR5A21, for $474.99 with free shipping. That's $25 under our Prime Day mention and the lowest total price we could find by $25. 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). Deal ends today.