What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I have reviewed your account and found this message appears because you've already reached the allowed upload space in your form, since you're using a free account you're allowed to get 100 MB in uploads and you have currently 993.07 MB.
This is due to the forms in your trash folder, there're some submissions with uploaded files and if you need to get more free space then those submissions need to be deleted, otherwise you will need to upgrade your account.