I need to create a playlist with my I tunes library, send it to my upstairs computer and then drag it to a thumb drive. My 2007 mac Pro will not let me add music to a thumb drive. I use the thumb drive for a radio show.I want to take my time in upgrading my Mac book, so need to make this work for now.I tried to set up computer sharing with I tunes, but it did not load my library.