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.
You need to delete the actual submissions that has attached files or uploaded files. Here's a guide on how to delete your submissions:
1. Select the form then click the Submissions.
2. In the Submission page, you can delete a single submission or delete all submissions.
Note: Deleted submissions are not recoverable. I suggest to download them before deleting them.
Hope that helps. Let us know if you need further assistance. Thank you.