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.
Upon checking your account, it seems like you have already reached your Upload space, which is 10 GB for Premium plan. To free up your upload space, you can do that by deleting your submissions with files uploaded on them. But please do take note that when you delete a submission, it will permanently be deleted in our servers, including the files attached on it. We advise that you download the file uploads and submissions as a backup.
You can also integrate your forms to file sharing and storage services like Dropbox, Google Drive and Box.net. This will give you copies of your submissions with the file uploads directly there.
I hope that helps.
How do I delete? Where?
The submissions can be deleted from the submissions view.
Hope this information helps!