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.
Yes it is possible to achieve your requirement by taking advantage of our "Google Spreadsheet" integration. When you integrate your form with google spreadsheet, it will copy the previous submissions to your google spreadsheet and then every new submission you receive in your form will also be copied as well. The following guide should help you how to integrate your form with google spreadsheet: https://www.jotform.com/help/228-How-to-Integrate-Form-with-Google-Spreadsheet
Hope this helps.
Do get back to us if you have any questions.