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"ACASIS Tool-free 40Gbps M.2 NVMe SSD Enclosure for M1 M2 Pro/Max, Updated Smooth Anti-scratch Aluminum Alloy NVMe Enclosure, Compatible with USB4/3.2/3.1/3.0/2.0, Support Up to 8TB Size 2280 M&B+M-Key"

ACASIS Tool-free 40Gbps M.2 NVMe SSD Enclosure for M1 M2 Pro/Max, Updated Smooth Anti-scratch Aluminum Alloy NVMe Enclosure, Compatible with USB4/3.2/3.1/3.0/2.0, Support Up to 8TB Size 2280 M&B+M-Key
ACASIS Tool-free 40Gbps M.2 NVMe SSD Enclosure for M1 M2 Pro/Max, Updated Smooth Anti-scratch Aluminum Alloy NVMe Enclosure, Compatible with USB4/3.2/3.1/3.0/2.0, Support Up to 8TB Size 2280 M&B+M-Key

【UPGRADED TBU401 TOOL-free & Plug and Play】No screw or screwdriver is required. This m.2 enclosure is lightweight, luxury and compact. You could easily pull the back-shell off or put it back with your hand. It ONLY supports M KEY and B&M KEY SSD with size 2280.

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Computer Accessories & Peripherals
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Enclosures

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2 comments of this product found across Reddit:
taperk /r/iMac
6 points
1970-01-20 11:16:09.8 +0000 UTC

I have the same machine. I tried using the USB ports as an external boot drive and yeah, it wasn't much faster. What you need to do is get a Thunderbolt 3 enclosure and a fast NVMe and it will rock.

Here is what I use: https://www.amazon.com/gp/product/B0BB74BQVN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

And: https://www.amazon.com/gp/product/B0B25LZGGW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Using BlackMagic speed test, I get about 2200 MB/s write and 2100 read. There are faster NVMe sticks, this is just the one I had already on hand. You might squeeze out a bit faster.

Good luck.

parasymchills /r/macmini
1 point
1970-01-20 11:01:58.017 +0000 UTC

I think you can find better performance than what the Envoy Express is offering. As mentioned, it performs at about 1400MB/s:

https://www.amazon.com/OWC-Envoy-Express-Thunderbolt-Enclosure/dp/B08LYQPRPJ

Whereas the Acasis enclosure can achieve speeds of about 2500MB/s:

https://www.amazon.com/ACASIS-Enclosure-Compatible-Aluminum-External/dp/B0BB74BQVN

...when it's used with a Samsung 980 Pro or WD SN850. There's a picture on that page which shows a table of the speeds, and there are some user reviews with posted pictures showing similar speeds.

HTH.