Cancel any time from Account Settings → Manage Subscription — it opens Stripe’s billing portal, no email required, no retention call, no hoops.
First: deletion is real deletion. Once the 90-day window closes and the data is purged, there is nothing to restore — for you or for us.
Second: NestVault doesn’t have a one-click export yet. If you’re leaving, the practical move during your remaining access is to download your attached documents and copy out anything critical before the window closes. We’d rather tell you that plainly than have you discover it on day 91.