JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
Only way to increase upload storage space of your account is to upgrade your account. More about different account types you can find on our pricing page.
You can also delete submissions with uploaded files on submission page to clear your Upload storage space.
Please take note: Delete submissions are permanently deleted and can no longer be restored.
I would suggest you to first download your files to your computer and then delete them. For example you can download Form Submissions as Excel/CSV/PDF:
Hope this will help. Let us know if you need further assistance.