RTL9120B-CB Issues on M2 Pro Mini

[foo2]

Has anyone else experienced issues with RTL9120B-CB based USBC devices with NVME disk and modern AS Macs? I have a Uni: (https://www.amazon.com/gp/product/B0BPCHC964/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) and I can read from it just fine, but I cannot write to it more than a few hundred MB (a few GB?) before it unmounts and I get 'disk errors'.

I can repro this on multiple Macs, multiple NVME SSDs.

I've updated the firmware from 1.21.11 to 1.29.8 and then to 1.32.68 - no change.

The amount of traffic I'm writing is so low I can't imagine there being any heat issues.

 

[PaulD-UK]

Sometimes using too high a spec cable to connect to the Mac can give errors.
I find my some of my external USB 3.2 Gen 2 SSDs throw an immediate error if I use a certified Thunderbolt 4 cable, but work fine with a cheap cable.

Or: Connect it to your M* Mac through a Thunderbolt 3 dock.
That way the dock will handle the USB control - and remove the incompatibility, and probably give you up to 200MB/s faster R/W speeds.

 

[foo2]

It’s an $18 device; it’s just a basic USBC cable. I’ll try a Dell TB3 dock and see if anything improves; thanks for the suggestion. Annoying to have this issue.

 

[foo2]

@PaulD-UK Thanks! So far so good - it's been working consistently at 100MB/s (ethernet download speed) for perhaps 30 minutes now without a disconnect. What a difference! Thank you!