With form database extension you can save and view your form submissions. All the submissions will be stored on your website without any limit. You can view and download the form submissions anytime the downloaded data can be exported to any email marketing services or used in excel files easily.
Each forms submissions will be displayed separately so make sure to give each form unique name so you don't have to face any problem later.
All you need to do is install & activate the premium extension pack and you will have access to all previous and new form submissions.