Restrict write permission on ROCK?

I run ROCK on a NUC. Wonderful! But: Everyone in the (Windos-) network has write permissions there (\ROCK\Data). How can I restrict the write permissions?

You can’t since ROCK is a locked down system. If you want an environment that you can control then try using a Linux distro (Ubuntu, Manjaro, etc) or Windows. They will allow you to control share permissions.

Thats what I feared. Thank you for your prompt reply!