save old messages to iMac hard drive
I want to save old messages onto my iMac hard drive so I can start now only syncing new messages across my three devices(iMac, iPad and iPhone).
I don't need to see those old messages except where they are stored on the hard drive. However, I want to save them in a safe place on the hard drive and backed up on my external hard drive.
iMac 27", 10.14