Debian for all things.

Add a test folder, add some data, delete the test root folder and see if it deletes the data.

Error message? Nextcloud logs?

Can’t tell you whats happening without information about what’s happening other than “it doesn’t work”.

If I’m supposed to be reading that top comment I don’t see where you state what your results were. You apparently “had errrors” but neglected to note any down and now “you don’t” have errors.

Replace existing online services you use with self hosted ones.

Replace existing online services you use with self hosted ones.

This it should be no issue for you to copy and paste that answer in our conversation.

And what exactly happens?

You tried what exactly earlier today?

I do exactly this as well.

Why not just run a reverse proxy container on the server hosting the rest?