OK, I took a beverage and my laptop out to the car this evening and gradually added folders/albums onto the 32GB USB I had, checking to see if it loaded after each batch. I managed to get about 3GB of music on it before it got stuck in the loop. This included adding about 50 songs that were single files. At about 695 songs, it seemed to cry "Uncle", and the loops/resets began. I dropped a couple songs, and it loaded properly again. I'll check again in the morning to see if all is well. This should be enough to get me through the dead spots, and I can always load a second USB for something different. Hope some other folks can get theirs working.