Chats get deleted automatically on Whatsapp

I think many people are using the delete feature, I would like to find out if most people are taking a backup of the chat, video, especially if it may be required in the future for reference.
I think WhatsApp allows people to set periodic backups for their chats. You might set your own to daily backups for chats that you think are important to yu and are on auto delete.
 
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