TESTED: OWC Drive Dock Takes 2 Bare Drives (HDD or SSD), Thunderbolt 2 or USB3
Get OWC Drive Dock at MacSales.com for about $245.

OWC has had various iterations of the NewerTech Voyager drive dock for years (USB2 and Firewire, then USB3). It was a good but not great product, and it only took a single drive.
Now the OWC Drive Dock arrives as a much higher grade offering and it’s both USB3 and Thunderbolt 2, with 2 Thunderbolt ports for daisy chaining Thunderbolt devices, critical for Macs that have only two TB ports. And it has an internal power supply, so no awkward external power brick.
The OWC Drive dock accepts either 3.5" or 2.5" drives—SSD or hard drives in either size. Bare hard drives and fast high-quality bare SSDs are the least expensive way to expand storage, since there is no enclosure (case) or power supply or cabling involved. With the OWC Drive Dock, just insert the bare drive and go.
MPG has been using the OWC Drive Dock for a few weeks now. It’s an excellent solution for anyone needing to work with bare hard drives or SSDs for backup or similar.
OWC Drive Dock: Thunderbolt + USB3 Connectivity Using Dual Bare Hard Drives or SSDs
For example, videographers who need to download and backup SSDs in a single portable solution. Bare hard drives and fast high-quality bare SSDs are the least expensive way to expand storage, since there is no enclosure (case) or power supply or cabling involved. With the OWC Drive Dock, just insert the bare drive and go, swapping drives as needed. For example, inserting two bare 6TB HGSG Desktar NAS hard drives into the OWC Drive Dock delivers 12TB of capacity at low cost. Swap more drives as needed.
The review also discusses upgrading the startup drive by using the OWC Drive Dock to clone the old drive to the new drive.
