There have been a host of macOS utilities over the years that remove macOS hidden system and metadata files from external drives in order to prevent compatibility issues on devices like MP3 players, car stereos, etc.: CleanEject: "Remove unwanted hidden files on USB-sticks, cameras, GPSses and other devices" Eject-for-Windows (GH): "Remove hidden files from removable storages" CleanAndEject: "Will clean most of the OSX created dot files that pollute every removable drive you plug into your Ma...