A question on Mail on Mac.
It seems I lost a whole Mailbox (abt 80 emails) from my ON MY MAC library.
Considering I am religiously backing up my computer every Saturday, this is no disaster.
I located the lost Mailbox on my back-up disk.
How do I transfer the “culprit” Mailbox from the external disk to its location in my library?
Tks
MacBook Pro 15″, macOS 10.13