(if you don't already have it preinstalled on your phone) Install the Google Photos app from the Google Play Store.Upon completing setup, tap 'Back up now' to activate automatic backups to the Google Drive account.To do so correctly, follow the onscreen instructions. On the following screen, tap on the 'Backup' option if you're using this option for the first time, you should turn on 'Backup' by Google One.After completing a backup, you can access your Google account data from anywhere in the world, whenever needed. Since your Android has access to a Google account, you can use Google Drive and Google Photos to back up data.
