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 can find more about available space for different type of users on Pricing page.
If you want to change upload size of field inside of your form you can see how to do it inside of this article:
Hope this will help. Let us know if you need further assistance.