This form shows the file upload field and a secure file reference.
When you navigate to page two of the form all of the data on page one is submitted to the server and the uploaded file is saved in the file store. Navigating back to page one causes the file upload field to generate a secure file reference so the file can be downloaded. This reference will exist for as long as the form session exists, including long-lived form sessions created by the save button. Once these form sessions have ended, the file reference and stored file are deleted (assuming nothing else has an interest in the file).
Enter your email address and upload a file. Use the next button, then return to this page to see the behaviour of the upload field. Press the revealed save button to send yourself a link to the saved form.
