What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
That happened because you went over the 100MB Upload Space limit for free accounts. To free up space it is best to back the files up to your computer or a cloud storage like box or dropbox using one of our integrations for that then you can delete them and that limit will remove itself.
Anyways though since you said you wanted to upgrade I've gone ahead and removed the limit for you which had temporarily locked your account until the monthly reset. You should be able to upgrade to the plan of your choice now and if you have any further issues with it just let us know.