I find the fastest way to transfer mp3 book file for bookport is to take the compact flash card out of the BookPort and place the compact flash in my flash drive readers. Then you can simply transfer the mp3 book files using windows explorer. When you do this BP recognizes them as mp3 files. When navagating on the BP you move by factions of time. When you use the transer tool to transfer mp3 books the BP software will look for breaks in the mp3 sound file to create "sentence" like breaks in the mp3 file. When you transfer just with window exporer you don't get these "sentence" liike breakes. But I don't find that a problem. I don't listen to music with BP. So I can't give you any recommendations on that. Jim Nuttall