Changed data directory, still limited

Setup:
Ubuntu 16.04
Nextcloud 13.0.5
Apache 2.4
PHP 7.1
MySQL 5.7
Redis 4.0
mDNS for network discovery

Hello Guys
I recently installed Nextcloud via the snap function. I followed this guide to move and configure my data directory to my 1TB hdd, which is mounted at /media/satahdd/. Dispite that change I’m limited to the size of the old storage.
screenshot

Additionaly I added the HDD as external storage named as ‘Lokal’. This way I verified, that the files are on the HDD.

Is there an configuration I missed?

The output of your Nextcloud log in Admin > Logging:

	Sabre\DAV\Exception\InsufficientStorage: 

    /snap/nextcloud/8269/htdocs/apps/dav/lib/Connector/Sabre/QuotaPlugin.php - line 139: OCA\DAV\Connector\Sabre\QuotaPlugin->checkQuota('/Filme/Shooter ...', 558537175)
    [internal function] OCA\DAV\Connector\Sabre\QuotaPlugin->beforeMove('uploads/RiimoH/...', 'files/RiimoH/Fi...')
    /snap/nextcloud/8269/htdocs/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105: call_user_func_array(Array, Array)
    /snap/nextcloud/8269/htdocs/3rdparty/sabre/dav/lib/DAV/CorePlugin.php - line 637: Sabre\Event\EventEmitter->emit('beforeMove', Array)
    [internal function] Sabre\DAV\CorePlugin->httpMove(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
    /snap/nextcloud/8269/htdocs/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105: call_user_func_array(Array, Array)
    /snap/nextcloud/8269/htdocs/3rdparty/sabre/dav/lib/DAV/Server.php - line 479: Sabre\Event\EventEmitter->emit('method MOVE', Array)
    /snap/nextcloud/8269/htdocs/3rdparty/sabre/dav/lib/DAV/Server.php - line 254: Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
    /snap/nextcloud/8269/htdocs/apps/dav/lib/Server.php - line 287: Sabre\DAV\Server->exec()
    /snap/nextcloud/8269/htdocs/apps/dav/appinfo/v2/remote.php - line 35: OCA\DAV\Server->exec()
    /snap/nextcloud/8269/htdocs/remote.php - line 164: require_once('/snap/nextcloud...')
    {main}