Install and open the Google Drive app.
Top left, Menu>Settings>Backup>START BACKUP.
How to backup your iPhone to the iCloud
Back up automatically:
Settings>{your name}>iCloud>iCloud Backup
(or Settings>iCloud>iCloud Backup),
then turn on iCloud Backup.
Back up manually:
Settings>[yourname]>iCloud>iCloud Backup
(or Settings>iCloud>iCloud backup),
then tap Back Up Now.
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How to backup your iPhone to Google Drive
