ACASIS 40Gbps M.2 NVMe SSD Enclosure for Thunderbolt 4/3/USB4, with Tool-Free Installation, Aluminum Heat Sink & Noiseless Design, Supports 2280-2230 SSDs for M1/M2 Pro/Max.

Very nice case, but get a fast enough SSD unit for it. I originally had a "Crucial P3 PCIe Gen3 NVMe 1TB SSD, Up to 3,500MB" SSD in there, & that was not very fast. Time Machine backups were estimating at 20 hours! I replaced it with a "Seagate FireCuda 530R SSD 1TB Internal Solid State Drive - M.2 PCIe Gen4 ×4 NVMe 1.4, speeds up to 7400MB" & as you'll see in the picture, I am now getting speeds almost as fast as a Samsung EVO Plus SSD. In addition, I am going through a Caldigit Thunderbolt 4 dock, not plugged directly into my 2025 Mac Mini. So this device can definitely, with the right SSD, deliver the speed.

I am blown away by the speeds that this SSD enclosure can deliver. I've got mine paired with a Samsung 990 PRO 4TB SSD and plugged into the Thunderbolt port of my Mac Studio. I'm seeing read/write speeds in the 2700 MB/s and 2600 MB/s range, which is so much faster than my previous 10 Gbps enclosure (which was achieving roughly 600-700 MB/s speeds). And this is with the SSD about 45% full. I use my system for video editing 4K content, and the scrubbing speed on my timeline has become instantaneous. I can quickly scrub through the timeline or jump to different parts of the video with ease... no lag anymore! Installation was super easy... just open the fully aluminum case, insert the SSD and rubber mounting plug, then push the SSD into the enclosure (no screws or screwdrivers needed). Close the cover and you're done. My Mac recognized the drive immediately. The enclosure can get warm (to slightly hot) when I'm rendering a long duration video, but that's expected of any SSD or hard drive. To keep the enclosure (and SSD) cooler, I keep the enclosure on top of my Mac Studio (which has an aluminum shell)..... this helps to dissipate heat a little better than if I were to place it on my wood desk surface. The enclosure looks great; it's sleek and minimalistic with cleanly milled heat-sink grooves. And the all-aluminum design is very-nicely machined and matches the design language of my Mac, awesome! I don't have a PC, but this is fully compatible on my Mac Studio running the latest MacOS.

Wish I could give this a better review. Seemed to work for awhile, but once I got deep into video editing it seems to overheat and unmount from my MacBook Pro M2 Max.

I was having a hard time deciding which enclosure to buy. I decided at last minute to try this one. it is very easy to install. if you have a gen 4 nvme SSD Western digital hard drive then this enclosure is cool to the touch. I am getting 2600 to 2800 for speeds. this enclosure is really fast with just a 10 GB file in 5 seconds tranfers speeds. This was the cheapest thunderbolt enclosure that I could find on amazon. I am impress it come with a real thunderbolt 4 cable. I highly recommend this encloure

Looks great, solid enclosure and fast transfer but doesn’t work with Lenovo L14 USB c ports. It works fine with Thunderbolt 3 and 4 but doesn’t work with slower devices like L14 ThinkPad.

Acasis TBU405 in a 2020 Mac Mini M1 Just a heads up. I was preparing to return the enclosure because the Mac did not see the SSD when it was in this enclosure. It turned out that I was using a different cable than the one supplied by Acasis. The cable was also a “fast” cable, but fails to work.

Drive is fast, stays cool, but for an external drive on my Mac Studio it disconnects during sleep mode. No software will mount it back, you have to physically unplug and plug the drive. I am sure this is a Mac thing, its always a Mac thing. Using it with a inexpensive Silicon Power 1TB UD90 NVMe 4.0 Gen4 PCIe M.2 SSD attached to the Thunderbolt 5 port.

First one out of the gate with Thunderbolt 4 that i could find months back. Nice and fast. Samsung 990Pro works a treat. 3000/WR plus. Great fast storage. It is not backwards compatible. TB4 only.

Works like a charm. No heating issue observed so far. Using WD SN770 2TB with my mac studio m1 max. Giving expected read and write speeds. Value for money product.

This very bad working condition Don’t buy this one .8000/-rupes waste this not working my mac studio thunder bolt and usb

I bought this Thunderbolt 3 SSD enclosure (Model B0DD34LH8R) to upgrade my Mac Mini M4, which came with only 256 GB of storage. I paired it with a 2 TB WD Black M.2 SSD, applied the thermal pad(both side of the ssd) (heat tape), closed the case, and cloned my internal SSD using Carbon Copy Cloner (CCC). After switching the boot drive, my Mac now runs from the external SSD smoothly — effectively turning it into a 2 TB Mac Mini without paying Apple’s huge storage premium. Performance is excellent — I get around 2800 MB/s read and write speeds, which matches the Mac’s internal drive speed since it’s already throttled around that level. Thunderbolt 3’s 40 Gbps bandwidth is fully utilized. However, the product description says it has a cooling fan, but it actually doesn’t. That’s misleading. Fortunately, the aluminum body and heat pad manage temperatures decently, but under heavy transfers it can get warm. ✅ Pros: True Thunderbolt 3 performance (~2800 MB/s) Solid aluminum body and premium build Easy setup and bootable on macOS ⚠️ Cons: No fan despite the claim Gets warm during long transfers Overall, still a great enclosure for Mac users, but the missing fan description needs correction.

It works well as advertised. It heats and since it is metal and has no fans, you can feel the heat. Can only be used in thunderbolt 4 and above. For the price, it is a major limitation

Pathetic