External storage @Local - missing information for admins

hi after a long journey of search and testing i think to find a undocumented information.
if the path is out of the web server root it don’t work as aspect with the rights www…(depends on the distri.)

You get the message You don’t have permission to upload or create files here
Hint ( you cant select the text is disabled by js, maybe to show what js can do ??? one reason of the bad performance on client site. )

eg. my path in the config.php is ‘datadirectory’ => ‘/Raid/nextcloud/data’,

I move the folders in the ‘/Raid/nextcloud’ directory and it works as aspect.

is this the right way?