Episerver Forms submission data older than 30 days can be unexpectedly deleted, even if the form is configured to keep submissions forever. If you are using version 4.30.1 or 4.30.2 - I would recommend upgrading ASAP!
Files uloaded to an Episerver Form, can not be accessed without logging in. Unless...
A form with more than a handful form elements can get incredible slow, if you use the element «Rich text (with placeholder)». I came across a form that took 25 seconds to load, resulting in over 700 calls to the database. Some rewriting got the loading time down to 256 milliseconds!