TERRAMASTER D6-320 External Hard Drive Enclosure - USB 3.2 Gen2 10Gbps Type-C HDD Storage Hot Swappable Plug and Play (Diskless)

I purchased the D2-320 2-bay RAID enclosure with USB 3.2 Gen 2 10 GbpsMy purpose with this unit was to mirror (RAID1) two 6TB WD Reds with a Linux machine. I’m not familiar with this brand, so I decided to test it a little before copying a lot of my files over to the D2-320.Getting everything working was pretty easy.I pulled out each bay, installing the drive was pretty easy, no screws needed. They provide a video on it if you’re unsure. I set the selector on the back of the unit to RAID1, shoved in both drives, connected the USB (drives are powered but won’t spin up until the USB is connected), then held the RESET button with the provided pin until the disk lights flashed. The system found one drive - as it should have.I wrote approximately 18K files and directories of various sizes to the array and then without disconnecting the USB or turning off the power, I pulled out one drive. I then connect the pulled drive directly to another computer to see that the files were in fact written to the drive. They were. All good to go.I replaced the drive. Both lights are green. Since no changes had been made to either drive, this is perfect, it didn’t try to rebuilt the arrayNext, I pulled the second drive out hot. Then connected that drive to the other computer and checked to make sure all files were also written to this drive as well. They were! It is working as it should be.I then created a couple files on the other drive and then replaced the pulled drive back into the D2-320. One drive light was blinking green, the other blinking yellow. According to the online documentation, this means it is rebuilding the RAID1 mirror. Perfect .. Everything is performing as expected. It did take a few hours to rebuild .. but these are 6TB drives, so that was expected.The USB cable provided seems adequate, USB C on both ends. If you need a different cable, consider that when purchasing.Average 1G file write 156 MB/s, average 1G read 221MB/s. Slow but these are mechanical drives connected via USB. Acceptable. Later, I watched a video using Jellyfin and reading, transcoding, and streaming worked perfectly fine.The large fan is quiet and seems to keep the drives cool. Airflow looks to be sufficient. How noisy the unit will be will depend on your drives. Some are louder than others.These drives will be part of a system I have in place which will be up and running 24/7. I’ll be very interested in seeing how well the Terramaster D2-320 performs in the long run. I’ll post updates after I have used them for some time.

Disclaimer: I've only used this for two days.I was hesitant to get this at first. I saw on another brand (QNAP) that it stated "The files and data stored on drives moved to/from a NAS (or another device) will not be recognized." and I wasn't sure if that was specific to them or if it was that way all around. For my purposes, I wanted my drive to be able to be read in pretty much any system. If this broke or was damaged or stopped working, I wanted to be able to put my drives into something else and be able to read them - I didn't want the data to be only able to be read in this box.And this was the case! I have plugged three hard disks in, each one containing data, and it read each of them just fine.Plugging disks is as simple as popping them in the tray, popping the two plastic side pieces in (no screws needed, though you could use them instead of the plastic side pieces, if desired), and pushing it in the bay. That's it.Disks go in easy enough, but they are latched in there, and though they are easy enough to unlatch, they are firm enough that I don't see it possible to "accidentally" unlatch them.The bays are numbered 1-4 on the bottom. My suggestion is to name the enclosure (BackUp, Media, etc.) and then name each drive after their position in the enclosure (Backup_1 or Media_3) etc. This way you can easily tell in Explorer which drive is which, if you were wanting to remove one.I actually ordered a second one. The first one will be used as my primary storage device, plugged into my router (it has a USB port for an external drive). The second will be used as a backup of that.I currently have a variety of drives in it - from a new 18TB to a smaller 8TB, to a really tiny and old 500GB drive I had laying around. It read all of them just fine. The 500GB had much slower write speeds, obviously, but the two larger (and newer) drives were capable of 100-200MB/S speeds.I am very happy with this and I'm glad I bought it.I think I would have liked the option to be able to turn individual drives off, but it's not that big of a deal. So far that's my only complaint, and it's not really much of a complaint!