When I am testing my form on the S-Drive it gives this error:
Your form could not be submitted for the following reason(s): Message body empty
However, when I check the submission on S Drive the data is there?
Why does it give this error?
Also, I am redirecting to my site, what does that mean? obviously it can't write to the site, so where is this information used?

Hi Rocky,
If your getting any errors from a form on S-Drive the best thing to do is to open a support topic.
https://www.coffeecup.com/help/myroom/
Redirecting is exactly that. Your sending users to a new location of your choice after the form has been submitted.