How do you make a USB loop back

I have made several usb s with music, and they play fine on my excellon headunit. The problem is when the last song ends an error pops up on screen, end of devise, or something like that. It doesn t loop back to the first song. Anyone know how to solve this?

 

I should revise this because I forgot to mention one important thing. The thumbdrives that do this have videos; not audio. I took music videos from utube, and reduced their size in vlc, so my excellon would play them, and they play well enough. It just when the last video finishes the excellon errors out. My audio thumb drives don t do this. I m not sure how to get the thumb drives with videos to loop back to the first song like it should.