How to Download Music Onto an MP3 Player. Insert your MP3 player into your computer. Click on the "My Computer" icon and open the file that reads "MP3 player.". Open your music-download program and click on "File.". In the "File" menu, click on the "Save as" listing. This will allow you to set the file to which you want your music to download.How do you convert music to MP3?
Hold the "Command" key and click the MP4 music files you want to convert to MP3 in order to highlight the files simultaneously. Then click "Advanced" and choose "Create MP3 Version.". When the conversion is complete, MP3 versions will appear below the original MP4 music files in your iTunes library.