https://kb.sandisk.com/app/answers/detail/a_id/7320/~/transferring-and-listening-to-audiobooks-on-a-sansa-player . By the way, it says you cannot use .aax (Audible) files; no you can with the Audible PC app. If you can download a Kindle file in .wp3 format, then you can copy it to the player. You need to have a USB cable, which you provide.