This could actually be an easy fix. If you have any files on the player that are not WMA or MP3 files, or that you've stored your music in folders - either way it could simply stop the drive from playing.
Incompatible Music Files: If you have loaded a music file that is not
compatible, it simply won't play. The SwiMP3 player works with mp3 or
wma files, but not aac (like from iTunes).
the incompatible files. Convert your other music files to mp3 or wma,
and if you are importing your songs direct from itunes, you'll need to
convert them to mp3s first.
Files: An MP3 player is similar to a Thumb Drive or Flash Drive because
it can hold any kind of file that will fit in the drive's capacity.
However, if you have loaded an incompatible file - including JPEGs,
Cover Art, Word Docs, anything that is not an MP3 or WMA file, the
player simply can't translate it into music.
Solution: Remove the incompatible files, leaving only your mp3 or wma files in your root directory.
The mp3 player is not able to open folders and play music files stored
inside, to the Swimp3 player the folder is simply an un-playable file.
Open the folders, move or copy the music files into the root directory
(remember, mp3 or wma - not aac), then delete the folders.
I hope you find this helpful.
MichelleSwimp3 Troubleshooting Video