When using the upload file widget, how do you specify the target of the uploaded file?

The uploaded files comes in the submission which is store in our severs, and you can view them a the submission page:

Also, you can view them from your email notification.

You can integrate your form with your Google Drive and also Dropbox account, so a copy of the submission and uploaded files are forwarded there. 

Please note that by integrating with any of the mentioned cloud storage services, it does not mean the submissions will bypass our servers.

So, if the upload limit is reached in your account(which is 100mb), what you could do is to delete submission to free up space(submission limit still counts) if you integrate with GDrive or Dropbox. 

Here are some guides that might be of your interest:

http://www.jotform.com/help/29-Upload-Field-Allowed-File-Types

http://www.jotform.com/help/33-Changing-the-Upload-Size-Limit

If you have another question, please open a new thread, we will be glad to assist you.