How do I suspend my account without having all my information deleted?

If you will not be using your account you may simply disable your form so anyone with the link can submit it. 

If you also want to download your data you will be able to do it by following this guide: How-to-export-all-of-your-data-at-once

If you just stop using your account your data will not be deleted and it will be there once you log in again. 

If you have any question, please let us know.