Check out the Freeform 3.12 beta! It includes a new SAVE & CONTINUE LATER feature that allows your users to save their form progress and come back at a later time to complete the form! Also included is a new PREMIUM FILE UPLOAD field type that shows file thumbnails and upload progress, as well as memory of the uploaded file(s) if there's an error on submit or editing an existing submission, etc. If you'd like to be a part of the 3.12 beta, please visit the following page for instructions and more details: https://docs.solspace.com/craft/freeform/v3/setup/betas.html