The iMessage service has no native plain-text archiving functionality, so there is no ready solution for archiving iMessages.
Does iMessage have Archive messages?
The iMessage service has no native plain-text archiving functionality, so there is no ready solution for archiving iMessages.
How do I find archived text messages?
If you want to check your Archived messages, just open your Messages app and access the Menu by tapping the 3 dots at the upper right. Then tap on Archived.