4 Ways on How to Back Up Viber Messages on PC 
Communities vs group chats
How to Hack Viber Chat History Easily using KidsGuard
does anyone know how can I get viber calling history from phone.???
How to Recover Viber Messages Without Backup? [with Video]
How to search chat history of someone in MS Teams
PDF format with attachments securely saved in a separate folder.
Next, you need to choose "Email" and choose your preferred email app where your message history will be backed up.