The files are stored for 365 days after the last download, if your file will be downloaded at least 1 time in 365 days it will be kept for another 365 days without limits.
Your files are protected. Only you decide who can download the file by sending a link to a single user or making it available to multiple users, in any case you can alternatively protect the download page with a password.
No personal data is stored and reused, traceability is limited to the cached session upload or download. If you use an account, none of your data will be shared with third parties or a user profile will be shown.