I have all my music ripped from cd's stored onto my PC. I use Win10 and use WMP for my media center. I copy and paste my entire library to my usb stick. Then I go into the usb folders and see that my entire library has been successfully copied to usb stock. I plug usb stick into car and realize that there are some albums missing. I go back and think maybe I missed some. So I format the usb and start over again. This time, as well as copying my library to usb stick via WMP, I also copy all of the source folders from my hard drive directly to the usb drive folder. Still, not everything is there when I play in the car. But it's not always the same albums (folders) that are missing....it seems to just be some random ones missing. One time, it was all my Yngwie albums didnt transfer, this time, all the Yngwie albums are there, but now all of my Mercenary albums are not there. (Doesn't make sense because I copy and paste the whole library in one fell swoop....its not like I skipped over anything. Also just ripped and transferred the latest Omnium Gatherum cd that I got..., but it doesn't show up when I look for it when I'm in my car. Doesn't make sense to me....considering I've formatted it a few times. One other thing is that not all the titles of songs and/or artists transfer properly either. When I put my library on random shuffle in my car, certain albums pop up without the name of the artist, when the information is all there on my pc. Why cant all the album folders and data just transfer over 100% with no problems whatsoever?