Sorry guess I should've mentioned that. I've got a 2016 pro 4 x with nav. USB in center storage console. I can try some older drives when I get back home but the one I have now I just bought for the purpose of using it in the truck. It's a Sandisk Cruzer glide 128gb drive. I had the same skip issue at times with my iPod but it wasn't happening nearly as much. The iPod is the last gen they made before switching over to just the iPod touch. I formatted the drive on my Mac to dos I believe. That was the only Windows option it gave me and I needed it to be able to work on both Mac and Windows. As for the music I just went in and took my iTunes library and copied it over to the drive so all folders are set alphabetically on the drive. It is weird and it did it again to me today too so it's not just a fluke.