(This is for the dual drive USB version). Died after about six weeks, just outside Amazon's 30-day return policy. The "manufacturer's warranty through Amazon" turned out to be that Amazon would give me Thermaltake's contact info and offer to intermediate if something went wrong. So I contacted Thermaltake and they sent a replacement (note: for cross shipping, you will have to pay first and then receive a refund; there is no courtesy period). The replacement dock worked for about five weeks, and then also failed.
With both docks the initial failure was a seemingly random disconnect, with the OS reporting that connected drives hadn't been ejected properly. Over a period of a week or two these disconnections increase in frequency to the extent that the OS can't even finish validating the connected drive(s) before the dock disconnects again. If the dock disconnected while a file write operation was in process, the file would be corrupted.
I ended up buying a Thunderbolt 2 to Thunderbolt 3 adapter from Apple so I could use my old Thunderbolt dock
HighPoint Dual-Bay Thunderbolt 10Gbps Storage Dock (RocketStor 5212)
on my new iMac. The Thunderbolt dock has been completely reliable for two years, across an older Mac mini and my new iMac. This Thermaltake USB dock has not.
| Number of USB 2.0 Ports | 1 |
|---|

![Sabrent USB 3.0 to SATA External Hard Drive Docking Station for 2.5" or 3.5"' HDD, SSD [Support UASP] (EC-UBLB)](https://images-na.ssl-images-amazon.com/images/I/71upaB1LzlL._AC_UL160_SR160,160_.jpg)
















![Sabrent USB 3.0 to SATA External Hard Drive Lay-Flat Docking Station for 2.5 or 3.5in HDD, SSD [Support UASP] (EC-DFLT)](https://images-na.ssl-images-amazon.com/images/I/715qwH-pWhL._AC_UL160_SR160,160_.jpg)

