You can also select this option from the Advanced menu. Either right click or Ctrl + click on your song or songs and choose Create MP3 Version. You can select multiple songs at once to save time. Select the song or songs you want to convert.
Select MP3 Encoder from the Import Using drop down list. Under the General tab, press the Import Settings button. In the Windows version of iTunes, select the Edit menu. In the Mac version of iTunes, open the iTunes menu.
Before moving iTunes to a SanDisk MP3 player, you must convert your library to the MP3 format. The SanDisk player was developed for use with Windows systems and typically syncs using Windows Media Player.
Most iTunes audio files are in AAC or M4A format. Sansa SanDisk MP3 players only support MP3 as their audio format.