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.
To check the used space, you can do the following.
You can see the upload space as shown in the screenshot below.
Additionally, you can open your Account page. After opening it, by clicking on Usage, you can see your account type and used&remaining submissions, payment submissions, form views, forms, upload space and submission storage.
Hope this helps. If you have further questions, please let us know.