Can I download or compress file sizes on uploaded pictures

Many pictures taken in the field are higher resolution than I need can jotform compress the files sizes to save on my space?

OR

Can I download the pictures off the jotform server?

It is not possible to automatically compress the files uploaded through your form.  It is possible to download the file attachments and them remove the submissions.  Once you have downloaded the file, simply delete the submission that it was uploaded with and it will remove the file.  This will clear up space in your account. 

http://www.jotform.com/help/269-How-to-view-Submissions