How to access external NextCloud datafolder - eviltoast

So, i have a NextCloud instance running, with the data directory binded to a folder on my storage. Now, when ik want to list or edit the contents of this folder directly from Nautilus or the terminal, I get a permission denied message. Obviously i do not have sufficent rights. How do i give myself permissions to at least view the contents of the folder? Maybe this is basis linux stuff, I have just not touched this before, and I don’t want to modify this folder or break my NextCloud ;)