The Drobo 5D is a Direct Attached Storage Device (DAS) featuring 5 drive bays (they can take up to five 3.5” SATA II/III HDD’s or SSD’s), one mSATA SSD in the Accelerator Bay (not included) and is equipped with one USB 3.0 port and two Thunderbolt connections to the host computer.  The Drobo 5D has an internal lithium ion battery to protect against power cuts and supports Drobo’s data-tiering system, this allows it to move regularly accessed data onto an optional mSATA SSD for increased read speeds.  We only had one Drobo 5D to review but you can link up t