Since few years I’m running a magic mirror on Rpi 3 with a 7’ touch screen and it’s doing exactly what I want.

I recently upgrade the OS to Bullseye and lost the wifi in the process … the best recommendation to fix it is to re-install the Pi … Why not, but I don’t want to lose time on re-configure everything if I could avoid it ( for a time is not the full OS who is broken…)

What would be the advises to backup some files to do a clean migration?

I’m thinking to use MagicMirrorOS as destination … is it a good idea?