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.
You will need to delete whole submission. It is not possible to delete only uploaded file. Inside of this guide you can find how to delete form submission data:
Please 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.
Hope thsi will help. Let us know if you need further assistance.