Backup refers to the copying of physical or virtual files or databases to a secondary site for preservation in case of equipment failure or other catastrophe.
First you need to open your WhatsApp
Tap on Back up to Google Drive and set up the backup frequency to your liking, or tap Back Up to do an immediate backup.
You will be prompted to select a Google account that you will back up your chat history to. If you do not have a Google account, tap Add account when prompted.
Please remember the Google account you are using for the backup.
Tap on Back up over to choose the network you wish to use for backup. Please note that backing up over cellular may result in additional data charges.