Disable cloud backup in WhatsApp
Update : WhatsApp saves chats done throughout the day in its cloud storage at night. This is because, if the user uninstalls WhatsApp or opens an account in a new phone, then cloud chat can recover old chats and media files.
The thing to note is that WhatsApp chat is encrypted but the content saved on the cloud is not encrypted. In such a situation, if it has access to a backup in the hands of a hacker, then by easily taking a backup of WhatsApp chat in another device, one can easily read them.
If you are worried that WhatsApp chat does not fall into any wrong hands, then disable the automatic cloud option immediately. However, if you un-install WhatsApp after doing this, you will not be able to recover the old chat by installing the app again.
Follow these steps to disable ... WhatsApp Settings> Chats> Chat Backup> Back up to Google Drive option> select Never.
Do not get caught in scam:
The last but most important rule - do not click on any unknown link coming on WhatsApp group without thinking. This can be spyware, which can steal personal information from your phone.
Also, do not download files sent to the inbox from any unknown number. However, to be safe from this, the feature is available in WhatsApp.
Due to this feature, it can be decided without your permission, who can add you to the group and who cannot.
To do this follow these steps. Settings> Account> Privacy> Groups> My Contacts.