Why are there TWO On My Mac, in the Archive Mailbox?
I am puzzled and confused.
The Archive "On My Mac" has two Mailboxes, on the MacBook Air 13", Yosemite 10.10.3; Mail version 8.2 (2098)
-- it seems by default:
Is there a good reason for this?
Are the TWO locations saving information and taking twice the space for there being what appears to be a duplication?!
If I want to remove one of these two, should I? -- and how to do so safely and hopefully easily?
Thank you for your time and consideration.
MacBook Air (13-inch Mid 2013), OS X Yosemite (10.10.2)