USB with Audio Units
When you plug in a USB drive, the audio unit automatically searches the USB drive for playable music files. See the owner's manual for more information about navigating USB menus and selecting music.
The audio unit organizes the music folders and files in a similar matrix that appears on the USB drive. The exception to this matrix is music files that are not located in a folder. The audio unit automatically creates a folder titled ROOT or FOLDER 01 and lists all these playable music files in it. If your customer complains that they can't find some songs loaded on their USB drive, recommend that they check the ROOT folder or FOLDER 01 for the missing music files.