Google Drive Auto Backup Shutdown
The Drive Android API which is used by the application for providing the auto backup feature to user's personal Drive account has been already deprecated by Google and will be completely turned down on December 6, 2019.
You can read more about it here.
What does this shutdown mean for your?
You will no longer be able to use the Google Drive Auto Backup feature. If you are not using this feature then you are not affected.
Unfortunately there was no alternative provided by Google in order to replace the deprecated API and provide the same functionality without requesting internet permission. Therefore the Google Drive Auto Backup feature will be removed.
You can still back up all application data to your Google Account.
Please check more at: https://support.google.com/android/answer/2819582