Welcome to the #dominoforever Product Ideas Forum! The place where you can submit product ideas and enhancement request. We encourage you to participate by voting on, commenting on, and creating new ideas. All new ideas will be evaluated by HCL Product Management & Engineering teams, and the next steps will be communicated. While not all submitted ideas will be executed upon, community feedback will play a key role in influencing which ideas are and when they will be implemented.
For more information and upcoming events around #dominoforever, please visit our Destination Domino Page
certstore.nsf is an application that deals with TLS certificates. It's not designed to be a "secure storage area" for all kinds of different files, that you'd like to retain in a safe space.
You can of course create a database on your Domino server and use it as a central storage space to keep a copy of the files you mentioned.