David> I have noticed that if the path name to a project contains David> windows specific characters (eg spaces) when closing a project David> it throws an error that it was unable to write to a backup David> file.
David> Happens every time with v6.02 under win 10 64 bit.
David> There is no problem accessing schematics and pcb files or David> symbols/footprints.
Can you open a problem report in the Kicad github repo? That would be a good thing to do.