how to backup to google

You can use Google Photos to store your photos. You can download the app in the App Store.

Google Photos

You can sync your contacts with Google.

https://support.google.com/contacts/answer/2753077?co=GENIE.Platform%3DiOS&hl=en

You cannot create a full backup file on Google. Only on iCloud. The other option is to backup your iPhone to a computer (Mac or Windows PC with iTunes).

Axel F.