Says I'm out of upload space

That's due to the file uploads attached on your form submissions, you may do the following: 

1. Download all your data, these guides will help you doing so: 

https://www.jotform.com/help/73-How-to-Download-Form-Submissions-as-Excel-CSV-PDF

https://www.jotform.com/help/374-How-to-Export-All-of-Your-Data-at-Once

https://www.jotform.com/help/356-How-to-Download-the-Submission-Files

2. Delete your submissions to clear up the used upload space, this guide will help you doing so: https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data 

Note that there is no way to just delete the files, the entire submission must be deleted. 

This guide will also help you with the limits on your account and your usage: https://www.jotform.com/help/408-Understanding-Your-Account-Usage-and-Limits 

Alternatively, if you do not want to follow the steps above you may upgrade your account, this guide will provide you the steps to do it: https://www.jotform.com/help/331-How-to-Upgrade-My-Account 

You can check the limits per plan on our pricing page.