directory not shown

I downloaded an audiobook (multiple mp3) and copied the whole directory to the player, but the directory is invisible. What I tried so far:

  • I formatted the player, changed USB-mode to MSC and copied all my music again

  • I renamed the directory

  • I converted the mp3s to wmas

  • I moved the directory

It is still not shown, all other files and directories habe no problems. Any idea?


Shown where? On the player or on your computer?