What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
Unfortunately, the Configurable list widget doesn't have a file upload option on it. You can learn more about this widget on this guide: https://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget.
But we do receive a couple of requests to have this feature on that widget, I will count you on our list of users looking for this. This will be forwarded to our developers as a feature request, please note that we cannot guarantee that this will be implemented. We will update you on this guide as soon as we hear any news.
For the meantime, here's a general guide on using our different file upload fields: https://www.jotform.com/help/332-How-to-Create-File-Upload-Forms.