If you have the feature enabled, Google Photos automatically backs up all your photos to the cloud. But sometimes when you’re on mobile, that’ll mean you run the risk of hitting your data cap. Thankfully, a new update for the app on Android will let you manually select what photos to up any time you want to. This update while small is quite important. You just need to select the photos you want to backup, tap on the three dot menu, and then choose “Back up now.”
Source: Google Photos