USB Hub not working since MacOS Big Sur update

I have the exact same issue with dodocool usb hub. However, I've found that this problem happens only with usb 3.0 devices. You can solve it by plugging your power cable into the hub instead of directly in the laptop port, but you will find that your usb transfer speed will be really slow. Nevertheless, if you use it to connect your Mac with an external monitor (like me), you can't solve the problem for now. Seems that it is a sort of safety block on the ports or something like that. The only solution is to downgrade to Catalina or hoping for an upgrade in the following days.

i also have exact same problem, i tried to mount the external hardesk in the utility but didn't work, and now i'm doing a first aid and its taking ages still didn't show any sign its going to work either!
and yes its only usb 3.0 devices that is not working anymore after the latest update BigSur, i tried everything i even formatted the laptop completely and stuck not able to have older version of the system so i had to reinstall bigsur!
everything important is on that external hardisk all my work my art my health my everything its 1T its years and years .. i'm so sad for not being able to open it!
and every time i see a tutorial about downgrade it needs a usb! i couldn't find anything not required usb!
i won't give up i'll either figure a way to downgrade or fix the usb port by my self!
i'll be updating you!
but i'm very glad there is people like me in this situation because when i contacted apple support they told me this is their first time to hear about such a problem cause by BigSur!

now i know i'm not alone in this!

2020 13 inch MacBook Air M1

dodocool DC50 is not working for me as well

So sad... I remember using this USB-C HUB in 2017 😞

I have the same problem with usb dodocool dc68, it only reads in usb 3 in version 2 it does not work