Would someone kindly explain to me the purpose of the Archive folder in the Mail App on my new MacBook Pro? Is it a kind of backup? I didn't create the archive folder, or knowingly add any emails to it, but somehow it has ended up it over 5000 emails. How does this happen and why? The emails I've looked at in the Archive folder appear to be copies of what exist elsewhere in the InBox, Sent folders etc. Sorry for the newbie question. I'm a new mac user of about a week.