Using Storage in /media/ Mounted from FreeNAS NFS Share Permissions Error

I just installed the latest snap instance, and mounted my NFS share via fstab. I also installed the removable-media plug in, and changed the config.php to point to the data share. I have the instance starting, but when I go to log in, I an error

Your data directory is readable by other users

Please change the permissions to 0770 so that the directory cannot be listed by other users.


I tried to change the permissions to 0770, but I cannot, even as root. I am looking for other workarounds, or if anyone else has bumped into this issue.


What happens when you try to change the permission? Could you please provide command line output?