Hello @MichaIng
Thanks for the response.
When I do a ls -la command in the nginx folder I got and output showing that me nextloud configuration was indeed www-data as user and group. But right below, I have the nextcloud-data folder, where the user and group are root.
Do I did a test, shutdown php and nginx, did a chown -R back to www-data on the nextcloud-data folder, then started Nextcloud and php again.
Then, from the web interface of my non-admin Nextcloud account, I created a new test folder.
Then from my SSH console, I navigated to, /usr/share/nginx/nextcloud-data/Frands/files and did an ls -l and can now see that the new folder is created as root.
Here you can see the folder: Ny Mappe is created as root.
The same happens, when I create new files.