Follow these steps to back up pictures to Google Photos: Alternatively, tap an image to open it, then tap the cloud icon in the upper-right corner of the screen (next to the star icon).
Once you tap on this feature, a confirmation screen will appear with a checkbox ... After confirming, select “Delete Google Photos backup,” and the backup process will be halted.
The Google Photos app on mobile devices has a built-in sync feature that saves copies to Google's cloud but can also export to your device, providing a quick way to back up photos offline.