In my old Fabia I used to have a ton of music-files on an SD-card, permanently mounted in the SD-card reader that was hidden away in the glove compartment. Since that is not an option in the Octavia 4, I have copied my music files to an USB-stick, and put that into one of the two USB-C ports. However, I can't seem to get the mediaplayer in the infotainment system to work with the stick. In the beginning, after some lengthy fiddling, I did manage to play some tracks. But the next time I tri