how can i see deleted files

Can you please give us more details about the deleted files you are referring to? If you mean the submission data, unfortunately, once the submissions are deleted, it is also deleted from our servers with no change of recovery.

So we are suggesting our users to backup their data before deleting: How to Download Form Submissions as Excel/CSV/PDF?

However, if you mean you want to see the deleted forms and recover it, you can find it from the trash. Please refer this guide: How to Restore Deleted Forms

Regards.