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 that's not possible. You can't save form files on your existing Dropbox folder automatically. You may setup it's folder names instead so it creates new folder names in your Dropbox. Example, if you set "Full Name" field as your Dropbox folder name, it would then create folder with the user's full name once the user submitted the form. Kindly check the last part of this guide for the folder naming setup: Upload to Dropbox with JotForm
Hope this helps. Thanks!