Google will remove un-updated WhatsApp backups from November 12
As per Google's agreement with WhatsApp, the search giant has started sending out emails informing users about changes.
In the emails, Google has made it clear that any existing WhatsApp backup that hasn't been updated in a year or more will automatically be deleted from Google Drive on November 12, unless users perform a manual backup before the specified deadline.
"This [WhatsApp backup removal] policy will go into effect for all users on November 12, 2018 though some users may see the quota benefits earlier. To avoid the loss of any backups, we recommend that people manually back up WhatsApp before November 12," said Google.