Then load new_game.iso in Dolphin.
If Dolphin is installed in a system-protected folder like C:\Program Files\ , it may lack the necessary "Full Control" to write data. dolphin iosfs failed to write new fst
wit extract game.iso extracted/ # modify files in extracted/ wit copy extracted/ new_game.iso Then load new_game
If your "Documents" folder is restricted or synced with OneDrive, moving the data can stop the error. dolphin iosfs failed to write new fst
specifically: