QNAP Dual 2.5” SATA SSD to 3.5” SATA RAID Adapter Converter - 2 x 2.5” SSD to 3.5” SATA Adapter with RAID Support for PC and NAS. (QDA-A2AR)

This adapter is designed with comprehensive consideration and user friendly.But before placing an order for it, something need attention:1) It will not work without 12V power. It can be used for external storage purpose, but not for portable purpose, which relying solely on power from USB port like portable hard drive.2) Its external dimensions are not the same as a 3.5" hard drive and it has an open-end design. Without a block like a pencil eraser attaching to it with a thin and small magnetic block to fill the gap between its opening end and the door of a rack, cannot be used in a tray-less mobile rack directly.3) Before using it, must follow instructions in user's manual to set the RAID, and update the firmware online first on Windows platform (need at least one hard drive inside to let the adapter to be detected) - Not all RAID adapter like this allows end user to update firmware online with tools provided by manufacturer.Good luck.

My case has very limited space and I could only originally put two drives in my computer. I had to choose between two 3.5 or 2 2.5. instead of building a whole new computer I bought this and it works amazing data limits are restricted to SATA speeds however that is not an issue for me. I patched all the firmware on my Samsung ssds which are known to have bad firmware and then I installed them into these qnap bays. And I set them to RAID 0 to distribute the load between them and show them as one volume so I don't have a hundred letters of drive locations. And I'm aware that there is a risk involved with data loss however the data that I would lose is not important. I did not install Windows on this. I use it as a steam library drive.

you would think between buying a qnap and a drive bay you would be provided the screws to mount the drive bay to the nas, that's not the case, both the qnap and this qnap bay product include screws for 2.5", however the bay mounts using 3.5 flathead screws which are not provided, and 99% of pc's / chasis come with non-flathead 3.5 or 2.5 which can't be used in the qnap (they won't fit), so... I have to order screws and just stare at the bay until they arrive... small things make a big difference...I'll update the review once screws arrive and i can actually use it in the qnap nas.

I'm using these in a PC (DELL Precision T7810, refurbished off of Amazon) and replaced the delivered 1TB 3.5" SATA HDD using this unit and 2 Samsung 860 QVO 1TB Solid State Drive (MZ-76Q1T0B/AM) that are setup to use RAID 1.Since this was a "clean" rebuild, it was easy to install the SSDs in the unit, set it for the initial straight through (so NOT RAID 0, RAID 1, or JBOD), turned on the system, when I was able to get to BIOS SETUP and see the device and apparently both disks; I shut down again, and changed the DIP switches to RAID 1, and booted again. On the 2nd boot with RAID 1 set, BIOS SETUP showed the QNAP RAID devices only. From there it was an easy task to use ACRONIS to Duplicate the original 1TB SATA HDD with the installation source to the new RAID 1 SSD set.Runs like a champ.Since I'm not using straight through, RAID 0, or JBOD, I can't comment on those, but in this scenario, I expect RAID 0 to work similarly.I will probably buy more of these to address concerns with disk redundancy, where I want to solve that with RAID 1.

Despite this coming from the US and being quoted 3 weeks for delivery, it actually arrived in less than a week. However, that is the only positive news. Having bought this to put 2 WD RED SSDs in RAID1 (and save a slot in the 453D in the process), the minute I slotted the caddy into the 453D, it instantly switched off. Not shutdown - off. Tried a different bay - same problem. Removed the disks (to rule out the fact that one of the SSDs may have now developed a fault) and tried again - same problem. Tried an SSD on its own - fine. Tried a HDD on its own - also fine. Disappointing.