1) Your own music collection: If you have music files stored on your computer, you can transfer them to your SanDisk MP3 player using a USB cable.
2) Online music stores: There are many online music stores that allow you to purchase and download music files, which you can then transfer to your SanDisk MP3 player. Some popular online music stores include iTunes, Amazon Music, and Google Play Music.
3) Streaming music services: Streaming music services allow you to listen to music online without having to download the files. Some popular streaming music services include Spotify, Apple Music, and Pandora. You can use a streaming music service to listen to music on your SanDisk MP3 player by connecting it to your computer or phone and using the appropriate app.
4) Free music websites: There are a number of websites that offer free music downloads. However, it is important to be cautious when downloading music from free websites, as some of these sites may contain malware or other harmful content.
5) CDs: If you have CDs that you want to listen to on your SanDisk MP3 player, you can rip the audio files from the CDs using a CD-ROM drive and appropriate software.