Chevrolet 2008 Colorado Owner's Manual page 199

The player is able to read and play a maximum of
253 folders, 50 playlists, 20 sessions, and 949 files.
Long file names, folder names, or playlist names may
use more disc memory space than necessary. To
conserve space on the disc, minimize the length of the
file, folder, or playlist names. An MP3/WMA CD-R that
was recorded using no file folders. The system can
support up to 11 folders in depth, though, keep the depth
of the folders to a minimum in order to keep down the
complexity and confusion in trying to locate a particular
folder during playback. If a CD contains more than the
maximum of 253 folders, 50 playlists, 20 sessions, and
949 files, the player lets you access and navigate up
to the maximum, but all items over the maximum are
played.
Root Directory
The root directory is treated as a folder. If the root
directory has compressed audio files, the directory
displays as F1 ROOT. All files contained directly
under the root directory are accessed prior to any
root directory folders. However, playlists (Px) are
always accessed before root folders or files.
Empty Directory or Folder
If a root directory or a folder exists somewhere in the file
structure that contains only folders/subfolders and no
compressed files directly beneath them, the player
advances to the next folder in the file structure that
contains compressed audio files. The empty folder
does not display.
No Folder
When the CD contains only compressed files, the files
are located under the root folder. The next and previous
folder functions have no function on a CD that was
recorded without folders or playlists. When displaying
the name of the folder the radio displays ROOT.
When the CD 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 (Px) first and then go to the root folder.
When the radio displays the name of the folder, the
radio displays ROOT.
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