Buick 2007 LaCrosse Owner's Manual page 273

The player will be able to read and play a
maximum of 50 folders, 50 playlists, 10 sessions,
and 255 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 name. You can also play an MP3 CD 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 50 folders, 50 playlists, 10 sessions,
and 255 files the player will let you access and
navigate up to the maximum, but all items over the
maximum will be ignored.
Root Directory
The root directory will be treated as a folder. If the
root directory has compressed audio files, the
directory will be displayed as F1 ROOT. All files
contained directly under the root directory will
be accessed prior to any root directory folders.
However, playlists (Px) will always be 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 will advance to the
next folder in the file structure that contains
compressed audio files and the empty folder will
not be displayed or numbered.
No Folder
When the CD contains only compressed files, the
files will be located under the root folder. The
next and previous folder functions will have
no function on a CD that was recorded without
folders or playlists. When displaying the name of
the folder the radio will display ROOT.
When the CD contains only playlists and
compressed audio files, but no folders, all files will
be located under the root folder. The folder down
and the folder up buttons will search playlists (Px)
first and then go to the root folder. When the radio
displays the name of the folder the radio will
display ROOT.
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