Back up Contacts
I have a Mac mini with Mojave, and my Contacts app (along with much else) is automatically backed up in iCloud. But I should like to be able to archive the Contacts in a stable way on my Mac.
I found these instructions online. in an Apple document: 'File/Export/Contacts Archive/Choose a location/Save', but when I did this, the attached warning appeared. As I wanted to archive Contacts, but also retain the current Contacts for everyday use, I played safe by clicking 'Cancel'. Which has got me nowhere. Any help or advice would be much appreciated.:
Mac mini, macOS 10.14