Issue with Port Proton

I recently bought a Steam Deck and I installed a few non-steam games via PortProton which was easily set up. Now I have a microSD and I thought I could copy/paste the games from the SSD onto the microSD. The games which need PortProton don't get recognized anymore, nor can I "add to steam" via PortProton anymore. Cutting and pasting them back onto the SSD also does not work anymore (the games…

See it on unix.stackexchange.com ↗