I have a Gmail account and I am keeping old emails, in and out, in Outlook all the way back to 2001. I store them in folders inside my main inbox folder. I find that all this email is pushing me over google's 15GB free limit. How can I safely keep all these old emails in Outlook, but detach them somehow from google? I am not even clear on the terminology here. I am not concerned about reaching these older emails from "any computer"; only on my primary PC will do. Also I am not concerned about backing them up as my email database files live within my dropbox folder.
So then, how to disconnect old email folders in Outlook from gmail's servers?