Google has announced its termination services Google+ Photos on August 1st. The termination of the service was expected after the introduction of the standalone Google Photos application that allows iOS and Android users to store all their photos and videos, regardless of their resolution.
So Google announced that starting August 1st it will begin to stop the photo service on its Google+ social network, first for Android devices, and soon after platforms of the Web and iOS.
Those who are still using Google + Photos would be good to change service and use the new Google Photos app that's been available in May for Android and iOS users.
You should also be aware that all your photos and videos will still be available and will be available after the service ends in the new standalone Google Photos application.
That way you will not have to do anything backup.
You can find all of your photos in the link below