I have a 2010 TL AWD, I just purchased a samsung galaxy s4 and when I plug the usb in it says not supported. I can get the bluetooth audio to work but I'd much rather the USB connection. Has anyone else experienced this issue and I apologize if this has been discussed already. I did a search through the threads and didn't come up with anything.

 

I had the same issue. The galaxy s4 does not have mass storage. You will need to root your phone. Afterwards, you will need to download busybox and sg USB mass storage enabler. Then you just have to add your music to your microsds storage and open the mass storage app and turn your microsd into mass storage mode.