I have always created a new mail account (ie; Archive 2013), provided invalid server info (so I don't accidentally send from an archive account), and copied all my folders into the new archive account, used the lost folder key sequence and then emptied my regular account folders. Over the years, I have had trouble with attachments. I've tried leaving them all in one folder and I've tried moving them to archive areas. It's hit or miss with attachments that are older.

How do you organize?  I have over 1 million emails in my accounts in the bat!