I downloaded (https://ownyourbits.com/downloads/NextCloudPi_OdroidHC2_01-12-19/) several times directly and via torrent-client and put it on a Micro-SD-Card, but the Odroid C2 does not boot.
The same Hardware and SD-Card with an Ubuntu-Image from https://odroid.com/dokuwiki/doku.php?id=en:c2_release_linux_ubuntu boots and works without any problem.
Do you have any idea, why the offered NCP-Odroid-C2-Image doesn’t boot?
Okay, 7h later, I found the answer by myself…
Odroid HC2 means “HomeCloud 2” and has nothing to do with the Odroid C2-Board.
HomeCloud2 is using the Odroid XU4 - Board!
So I need the XU4 to bring up the Odroid-HC2-Image.