On Linux, to ensure that Mu to operate with the MicroPython based units you will need to ensure you include oneself to the correct permissions group (generally the dialout or uucp teams). Also make sure that your distribution automatically mounts flash equipment, or You should definitely mount them manually. https://black-myth-wukong-gamepla87531.articlesblogger.com/58652108/how-the-golden-colossus-event-mu-online-can-save-you-time-stress-and-money