Backing up or exporting my messages
We know that your messages are important to you, and it is important to us that you are able to save them.
On all platforms excluding Windows Phone, we provide you the option to send your chat history in a .txt file, attached to an email. On Windows Phone, your chat history will simply be included in the body of the email.
To learn about how to recover deleted chats from a backup, please read this article.
WhatsApp Support Team