(You need to turn this On to save WhatsApp conversations.)
2- Open WhatsApp >> Settings button >> Select Chat Settings >> Chat Backup >> Back Up Now.
3- In the same place, you will see an option called Auto Backup. Tap it, by default, this is set to Weekly. We suggest that you change this to Daily to avoid data loss.
4- To restore backups, uninstall the app and reinstall it. Select Restore after verifying your phone number.