ACASIS 40Gbps M.2 NVMe SSD Enclosure with Aluminum for Thunderbolt 4/3/USB4 | Tool-Free Installation;Heat Sink; Noiseless Design;Supports 2280/2260/2242/2230 SSDs;40Gbps;Stable 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.

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.

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.

fast and quiet

Purchased this to hold my macOS photos library. It’s a very nice looking piece of hardware. It feels a little cheap just in that it’s very light but it’s kind of inherent to the form factor. It can make it not want to stay situated exactly where you put it. It’s so light that the cable you plug into it wants to determine its orientation and will easily shift it slightly until the cable has gotten comfortable. You could help this (a little?) by installing some rubber feet, but I’ve found I need to use it without feet, for thermal reasons. My NVMe drive throttled regularly while backing up my photos, until I realized setting the enclosure directly on the aluminum foot of my iMac dissipated the heat so well it never throttled since. I’m a little torn, because I consider the thermal performance a big flaw. However, it’s a flaw inherent to the class of enclosure, and they do offer one with a fan. Noise levels were very important to me so I reluctantly kept the fanless one and it’s been working flawlessly for me ever since. If I didn’t have a giant heatsink extension sitting right on my desk in the perfect spot for this drive to sit? 100% this would have been returned for an enclosure with a fan.

3 stars because I got it running with AI accessing my system. I wouldn't have been able to do it solo. Mac would see it and close it to quickly to do it as a human. I had AI monitor as i plugged it into the system and it immediately formatted it to make it run. Below is the output prompt of what we did and tried. - Initial issue: enclosure repeatedly failed to enumerate on macOS (persistent enumeration failures, XHCI timeouts, TPS65983 accessory warnings). - What finally fixed detection: 1. Moved connection off the front USB-C ports to rear Thunderbolt/USB4 port. 2. Swapped to a better USB-C cable. 3. Replugged and monitored live kernel logs. - Successful attach signature after fix: - Thunderbolt device enumeration (ACASIS TBU405AIR) appeared. - NVMe media published as KINGSTON SNV3S1000G Media. - Disk showed up as external /dev/disk4. - Final macOS prep: - Reformatted disk to APFS + GUID (diskutil eraseDisk APFS ... GPT /dev/disk4). - Renamed volume back to LLM_DATA. - Disabled Spotlight indexing and excluded volume from Time Machine to reduce extra writes. - Critical workaround: once the drive finally enumerated as /dev/disk4, we had to act immediately and run diskutil eraseDisk APFS ... before it dropped again. Waiting even briefly risked losing the device and restarting the process.

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.

Excellent solid construction and dissipation of heat. Fast and reliable with the fastest cards. Much cheaper than upgrading the MAC specs at time of purchase. I use 2 of these now and couldn’t be happier. Really easy to set-up with clear instructions! Definitely recommend…

Easy install and plug and play product ,with samsung 980 NVMe M2 i was able to achieve 2754 MB/s Read & 2802 MB/s write speed perfect for 4k video editing directly from external ssd instead of copying to my local. Best product and very much satisfied.

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.

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.

Failed after just a month of use. There is no warranty so be aware before you buy it.

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