Upload restrictions

It seems like you have submitted your question too early with only few details.

Could you please provide us more information what you meant about restrictions?

You can check the following links that might help you:

If you like to change the allowed maximum file size in your file uploads, that is possible by following this guide: https://www.jotform.com/help/33-Changing-the-Upload-Size-Limit 

If you like to change the allowed file types to be uploaded, that is also possible by following this guide: https://www.jotform.com/help/29-Upload-Field-Allowed-File-Types 

Let us know if I misunderstood your concern.