"You have reached your JotForm upload limit"

Hi There, 

I received an email telling me that reached your upload limit. If I delete some submissions, will I gain space again as I am not yet able to use the paid version of your services? 

Thank you 

Yes, deleting the file will free up the space on your account, note that it's required to delete the associated submissions to delete the file. 

This guide will help you deleting your submissions: https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data 

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

I hope this helps.