Hi, @cfjedimaster. If you are using Netlify Forms then we don’t automatically delete the submissions and you are required to do so if you want to avoid exceeding the the limits of Forms level 0.
Now, if on the other hand, you are actually creating a serverless function to handle form submissions and not using Netlify Forms at all, then there is no local storage persistence for Functions so there is nothing to delete.
In other words, the answer greatly depends on how the form is being implemented.
Are you creating a completely separate form handler using Functions and not using Netlify Forms at all? If so, there is nothing to process and no files need to be deleted.
Are you using Netlify Forms and using Functions to supplement the form handling? If so, then “yes” is the answer. You are required to log into the Netlify web app and delete form submissions you no longer want. This can also be done using API calls instead of using the web UI if you prefer to automate the form submissions deletion process.
Also, our support team can delete all the form submissions for you if you tell us the site and form name. (It is “all or nothing”, though, as we cannot delete only specific submissions.)
If you want to share more details about the implementation or if there are other questions we will be happy to discuss this in more detail.