I have had the player for 5 months and this has happened twice - after plugging in the player for charging (over several hours) I’ll remove it and all the files will be gone. Not copying files, only charging. It will still show the space as taken up, but no files anywhere in the directories as viewed on the player or on the computer. Each time this has happened I’ve had to format to get the space back, and then reload all the files & redo the radio presets.
Can someone tell me how to avoid this and if there’s a fix?