I am struggeling with my installation. I have Debian 9 running on a small ITX system. I have mounted a folder from my NAS to lets say: “/mount/nextcloud”. The docker container is set to use the mounted folder as “/data” directory. After the container is up and running, nextcloud tells me that it can’t write to the “/data” folder but my user and root are able to write into that mounted folder. Where is the error?