No, I haven’t moved my data dir yet.
I’m thinking of shifting the whole system to an SSD later on.
That specific part of my config.php looks like this after I edited with vi
‘tempdirectory’ => ‘/tmp/nextcloudtemp’,
array (
‘/var/www/nextcloud/data/tmp’ => ‘’,
),
I don’t know how to reload the webserver 
so I rebooted the device, but it seems that the
sudo mkdir /tmp/nextcloudtmp
will not survive the reboot…
And shouldnt it be /tmp/nextcloudtemp