Let's assume that there's a restore point from those years, you can try to go back on that time through system restore but you have to make one first for the current time so you can revert it back to present time.

But if that doesn't help, you can ask this question on aol's support if there's a way doing that. I've tried checking my email from a different provider and I got the same situation as you, I can no longer see the old files/folders saved and emails I've received since 2010.