Received an email saying "Action Needed: You have reached your Jotform upload limit"

I had a question about what limit exactly this refers to. I'll provide a snip it of the message. Would purchasing the Silver annual plan resolve this?

Hi,

You can solve the issue by either upgrading to a higher plan or deleting some of your submissions to clear upload space. Please make sure to delete the submissions from your trash as well.

Guide: https://www.jotform.com/help/377-how-to-delete-form-submission-data

Please let us know if you require any further assistance.