I do the same (well, I don't use OneDrive all that much). I use my e-mail with Outlook exclusively and what I did was creating a new local Outlook account, in

I do the same (well, I don't use OneDrive all that much). I use my e-mail with Outlook exclusively and what I did was creating a new local Outlook account, in which I move all my e-mails from time to time. That way, there's an offline mailbox you cannot loose in case of a ban or anything like that. Just make sure you set your Outlook to download everything, not just last year or so. My motivation was a bit different, I didn't like the idea that someone could make it to my account and see literally all my e-mails sent and received in last 15 years. I mean I do have 2FA setup, but I don't trust MS over my offline backup stored on an encrypted device.