Only way I found to both use the front cam recorder in V9 and also play MP3 songs on my USB drive was to plug in two different USB drives in the front. First has just a folder "TeslaCam" and the second USB has my MP3s.
If you have just one drive with your MP3s and the TeslaCam folder, it just uses that drive to record the Cam and the media player does not see the MP3s on that drive.
Hope this helps others and maybe in a future SW update Tesla will "fix" this. Drawback of current implementation is that since you use both the front USB ports, you need to plug your charging cable in the back USB ports to charge your phone....
If you have just one drive with your MP3s and the TeslaCam folder, it just uses that drive to record the Cam and the media player does not see the MP3s on that drive.
Hope this helps others and maybe in a future SW update Tesla will "fix" this. Drawback of current implementation is that since you use both the front USB ports, you need to plug your charging cable in the back USB ports to charge your phone....