Is it possible to make whatsapp messages static?

Hello all.
I've got important heartfelt relational messages on my Samsung galaxy S3-mini. In November it will not be supported anymore on this phone.
Calling out to all it possible to disable whatsapp, and to use this phone to watch the whatsapp-messages indefinitely offline. Please help!!
Thank you,


System Configuration: Android / Chrome 93.0.4577.82