Tried searching for this but could find anything useful so hopefully someone here will know.
Ok from what I can tell Retropie or ES is trying to make a (mkdir) tmp directory when trying to run a rom but for some reason it is failing, basically I keep getting told there isn't enough space left which is bonkers because it's a 64G sd card and the roms are on a 128G USB stick and both have a heap of space left on them. The big problem is most of the roms will fail to run after this error with the exception of snes games.
This is on a RPi 3 B+ with RetroPie 4.4
Any help would be appreciated.