MiyooCFW VS businesscard-linux

Try getting a second SD card and flashing it with the Miyoo cfw from here. It's probably something corrupted on the card.

And/or just install one of the nightly builds yourself and see what issues you find. They can be found under the actions tab on github, although I think you have to be logged in to actually see the download: https://github.com/TriForceX/MiyooCFW/actions/workflows/build.yml

Generally speaking RetroArch allows installing and removing cores, but no clue how it works on this device and what the steps are if its possible. This article or tutorial might interest you: https://github.com/TriForceX/MiyooCFW/wiki/RetroArch-Setup I think you should be able to download a core from this place https://buildbot.libretro.com/nightly/dingux/miyoo-arm32/latest/ and just put it into the cores folder in RetroArch on your device. But there might be additional steps needed to integrate them into the system, not sure at this point. BTW you should have added the name of the device into the post title. Such generic titles aren't helpful.

I have used already the cfw for this model https://github.com/TriForceX/MiyooCFW/actions/runs/4988520114

A Business Card?

I'm not saying it's a cure-all and I'm a security researcher too. At least giving people an environment which gives them a little more security by default and a lot more when you enable things like AppArmor or SELinux I think puts it miles ahead from Windows. Also the amount of customizability you get with Linux (like how small you can make it), how responsive and resilient it can be I feel makes it the only real option for embedded. People can get Linux on a business card so it's very light! And it's free, which was my main point.

Hi! So I was trying to build the business card similar to the one by thirtythreeforty.net

Linux can run on anything, even a business card.

Stuff like Business Card Linux might be worth a look. There's some useful links here