What I mean by copy.
I need to backup my outlook files and found that archive failed too many times. Since I can copy it out, then I can always bring it back with everything. Or place it in another user account if I want to look at it.
-> I can't explain MSFT's app behavior. Sorry.
But did you compact your email after the deletions? I didn't read you did that. It's not easy to find in the menus in my opinion.