- ACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key

It was bought from Amazon US. It is costly and if you look into the reviews and ads, I am supposed to get good speed from latest and costliest SSD. I had doubts because Internal chip uses older pcie 3.0. Now tested and found out that even with my cheap 1Tb WD SN570 from Amazon, I am getting over 2200MB/s read write. Values are in attached Screenshot. It is twice faster than any USB 3.2 Gen 2, faster than my Mac mini M2 256GB that it attached to. Very good. Serves more than I need.

Bought this and it works well. The cable on this enclosure ie much better than the other enclosures I have bought. Has no fan and is on even when the Mac mini M4 is shut.

「MP600 PRO XT CSSD-F8000GBMP600PXT」を内蔵して使っています。8TB と正常に認識されています。このNVMEは両面実装なので、その配慮もあると、もっと良かったです。

Works great speeds nearly 4,000Gbps great value

I’m thoroughly impressed with the ACASIS 40Gbps M.2 NVMe SSD Enclosure. The speed is outstanding—file transfers are incredibly fast and efficient, exactly what you’d expect from a 40Gbps-capable device. I’ve used it with several SSDs, and performance has been consistently smooth and reliable. The aluminum build is solid and professional, keeping the drive cool even during extended use. Setup was truly plug-and-play, and it worked seamlessly across my Mac and Windows devices. After 6 months of regular use, I can confidently say that I haven’t encountered a single issue. Whether for backups, large file transfers, or portable storage, this enclosure delivers top-tier performance and durability. Highly recommended for anyone who wants reliable, high-speed external SSD access.

I am using a pair of these SSD enclosures to provide 4TB (main data storage) and 8TB (TimeMachine backups). I have these guys configured as RAID-0 storage for speed. Speed is > 2GB/sec and < 3GB/sec for large sequential file copying. I wanted to keep costs down, so instead of getting TB5 enclosures and TB5 rated SSD chips, I got the less expensive TB4 versions. Plenty fast enough for my purposes. When push comes to shove, TB4 is just as good as TB5 for random access I/O - which is what 90% of my workload consists of. Make sure to turn on the fans (there is a button). When I ran my first TimeMachine backup, the 8TB enclosure got hit. The fan cooled it off VERY nicely. These enclosures can be daisy chained. I have the 8TB connected after the 4TB. Very nice. Dead quiet. Have been using these guys for about 2 months with no issues. Value for $$$ is excellent. I recommend for anyone serious about using SSD for their main data storage and first level backups. I have used these guys on a 27” iMac and am currently using them on a Mac Studio.

Works as advertised, I partitioned, and formatted, two 4Tb Samsung 9100 Pro NVME M2 SSDs, PCIE v4.0x4-5.0x2, and the data transfers are incredibly fast, I'm happy that it's made my data storage solutions more versatile and portable..... It's very easy to set up, tools aren't required, be careful with the rubber standoffs, I lost one and had to improvise the mount, {these fit at the end of the SSDs to keep them from shorting out on the logic card adaptor from the PCIE to USB-C 40Gb/Sec data buses}..... I needed the 2 Drive enclosure because my Geekom Mini IT15 has only 2 USB-C Ports, {both 40Gb/s}, and I needed the other port to run A 4 port USB-C Hub, to attach other NVME External SSDs..... This enclosure also supports 40 Gb/s pass through, as there's a second port on the device..... I've had this for a couple of months, and not encountered a single glitch, or failure.....