Have you looked at the ServerStorage sample?
You’ll need to have a signon. Having a hard coded signon is not recommended for the obvious reasons. It’s the only way to have practical security.
A 75K entry in ServerStorage is no problem.
To save the data on the server, add a save data feature to the same app. When sign in as the admin user, enable the code to do the save. One of the fields returned on signon is admin, so you can do this:
If user.admin then…