You can store up to 20,000 songs from your library in the cloud, for free, with Google Play Music (not available in all countries). Then you can instantly listen to your tunes wherever you are.
You can upload music from your:
To upload your music, use Google Play Music for Chrome or install the Music Manager application on your computer. On your computer, visit play.google.com/music and click
> Upload music. To learn more, read Google's help.
After you’ve uploaded your music, you can listen to it: