JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
To confirm, you would like to add a file upload function or feature in your form, is that correct?
You can use the default File Upload field found under the "Form Tools" section
When using the default File Upload field, it will directly be uploaded to our servers.
You can also check this guide: http://www.jotform.com/help/332-How-to-create-upload-forms
Another information that I can share, you can use the file sharing storage and services like Dropbox, Google Drive and Box.net to your form that has a File Upload field. Here's the app page for them: http://apps.jotform.com/category/file_sharing_and_storage
These guides on how to set them up might help:
If you need more information on this please let us know.