Is it possible to empty the storage that the attachments occupy?

Hola consulto si es posible vaciar el almacenamiento que ocupan los datos adjuntos .

I see that your account is now occupying about 60MB of storage space. Please be noted that it is required to delete the submissions of the form with file upload fields. I see that the form titled "Gestión de inventarios Servicios Centrales Universidad de Chile" is having around 450 files uploaded. You may delete the submissions for this form in order to clear the storage space. 

Please be noted that the submissions deleted cannot be restored in any way. You may need to take a backup of the submissions along with the uploaded files before you delete the submissions from your form.

Hope this information helps!