Upload Question

What is the maximum file size you can upload for all the different price tiers?

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:

http://www.jotform.com/help/33-Changing-the-Upload-Size-Limit 

Hope this will help. Let us know if you need further assistance.