If the mp3 player you are using is plugged with a memory card, unplug the memory card and put it in the card reader, then plug the card reader into the computer, download your favorite songs to the computer, and put the downloaded songs in the memory card. Finally, insert the memory card back into mp3. If you use an mp3 with its own memory, connect it to the computer with a data cable, and then download the songs to it with the computer. After the download is completed, unplug the data cable. Finally, downloading songs through the computer is free.