How to Back Up GarageBand to Google Drive

NOTE: You cannot back up a Garage Band file to Google Drive. You will need to upload the rendered song.

Tap and hold on the song you wish to upload. 

Tap the export button in the top left-hand corner.

Select Google Drive. If Google Drive is not in the list, scroll to the end and select More, and then turn on Google Drive using the switch next to it. 

Select the Email you wish to use for Google Drive and select where you would like to save it. 

Check Google Drive to make sure it was uploaded correctly.