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.
Well, it depends on the filesize that is being uploaded into your JotForm. If the provided storage place is completely occupied, the account will be tagged as overlimit and you'll not be able to receive any further submissions until you delete the submissions to clear the storage space. Please be noted that the submissions deleted from JotForm cannot be recovered in any way. Hence, it is always a good idea to have a backup of your submission to Google drive or DropBox or similar.
You may restrict the users to upload the images upto a specified size by setting Max File Size.
Please refer to the following guide that can help you with.
Hope this information helps. Let us know if we can be of any further help.