When the disc contains only compressed files, the files are located under the root folder.

The next and previous folder function does not function on a disc that was recorded without folders or playlists. When displaying the name of the folder the radio displays ROOT.

When the disc contains only playlists and compressed audio files, but no folders, all files are located under the root folder.

The folder down and the folder up buttons search playlists first and then go to the root folder. When the radio displays the name of the folder the radio displays ROOT.