USB function: Notes
Music files can be stored on portable USB devices (flash drives and approved iPod products) and played through the audio unit by using the USB adapter. Although a customer can create many different folder levels on their USB device, the audio unit only recognizes two levels and automatically sorts the music to meet this requirement.
To play the music files, use the dial selector to find the folder where the music file is located, then select the album or music file (see the owner's manual for more information about selecting and playing USB files and approved iPod products).