On the Bronze 10GB Available space

on the Bronze 10GB Available space.

Is that 10GB for the size of the forms you are creating correct?

10 GB is upload storage space. This space is used only for files that were uploaded on your forms. 

More about File Upload Forms and file upload field you can find inside of this guides:

How to Create File Upload Forms

Changing the File Upload Size Limit

How to Change the Allowed File Types/Extensions in the Upload Field

Size of the forms that you create does not affect on upload storage space.

Hope this will help. Let us know if you need further assistance.