The root directory of the CD-R or CD-RW is treated as a folder. If the root directory has compressed audio files, the directory displays as F1 DISC. All files contained directly under the root directory are accessed prior to any root directory folders. Playlists (Px) are always accessed after root folders or files.

The HDD Radio displays the root directory of an MP3/WMA disc as F1 MP3 and the root directory of a USB storage device as F1 USB.