USB-C Card reader not compatible? (Sandisk UHS-II)

[JohnMagnus]

Well, I have a "Sandisk Extreme Pro SD UHS-II" USB-C card reader.
It seems to not work at all, as it does not recognize any of my SD cards.
(MBP M1 16G 1TB)

Nothing happens when I insert it. Its visible in the "System info" under USB. Nothing else.

If I reboot with the reader and a card inserted, the MacBook starts up, but act weird and end up with a "blue screen" restart. (Not sure what the term is on a Mac).

The reader works fine on my PC. The cards work fine on my iPad (with a SD-lightning reader).
Luckily I can manage by connecting my camera with a cable for now, but hopefully this will be fixed...

Is this due to lack of updated device drivers for ARM?

 

[Fomalhaut]

I have one of these too, but with the USB3-Type A connector.

This would be a deal-breaker for me because I would need it to import photos and video.

Have you tried contacting Samsung tech support?

 

[chscag]

This is likely to be a macOS Big Sur bug which Apple should fix in one of its updates. Someone in another forum I frequent has reported the same thing. And another member reported a problem with Micro SD cards not being recognized, again he was running Big Sur.

 

[Bending Pixels]

The Apple version of the SD card reader works fine

 

[Fomalhaut]

The Apple version of the SD card reader works fine

Good to know, but we still need a fix for non-Apple USB devices, of which there are millions!

It surprises me that a USB-C device that requires no drivers does work out of the box. I wonder if it due to the USB implementation or the SD-card reader part of the adapter?

I also find it odd that none of the reviews from video editors have mentioned this. The Samsung SD-card readers are quite common.

 

[Mechanism]

It's not much help but my Anker 2-in-1 USB-C card reader works, as does a Transcend TS-RDF9K2 with a USB-C to Micro-B 3.1 Gen2 cable.

 

[mariuszV]

My M1 Mac shipped, I check a my Sandisk card reader (same as @JohnMagnus) - working perfectly with any cards (Sandisk, Wise, Kingston). No issues.