To set your Backup settings please follow the instructions below:
1.Tap on the hamburger icon on the upper left .
2. A side menu will open tap on Settings.
3. After you've tapped on Settings tap on Auto Backup and all your current Backup settings will show.
Auto-Backup Contacts: Automatically backups your address book.
Save in Google Drive: Saves all your backups in your Google Drive and avoids you from losing data.
(PLEASE NOTE-You must be connected to your Google Drive to set your backup to be saved there).
Backup Schedule: Set the frequency of how often to backup your contacts-Backup Daily, Backup Weekly or Backup Monthly.