this may help somewhat for those that have the 2013 & newer Rams
they have radio supplements that you can download
for those that have the 2009 - 2012 Rams, go to this site
you need to know the 3 letters
on the face of your radio, lower right corner, by the AUX port
Choose your radio & look for the radios owner manual
if you have the RER 730N radio, look on page 47 of the radio manual, it reads
NOTE: When copying CD Audio to HDD, audio files
are converted from CD Audio to WMA. DVD-Audio
cannot be copied to the HDD.
Copy WMA/MP3 Files to Hard-Drive
You can copy MP3 and WMA formatted compressed
audio files from a disc or via USB (e.g., USB stick).
It is recommended to sort music files into folders
Fuller explanation follows on the next pages