What will happen if I downgrade my subscription to the free plan?

If I downgrade my subscription from bronze to free do I loose my old forms and the associated submissions.

The forms will be kept, but your Total Submissions Storage will be limited to 500. Since there is a limit, your oldest/excess submissions will be automatically deleted. 

We suggest downloading your form submissions before the system deletes them. You're good if you already have the backup. 

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