It's an armhf device, with a very low power. Even debian was somewhat heavy, so I migrated to Devuan instead. It uses this armada-370-seagate-personal-cloud.dtb dtb file and initramfs and kernel images to install. I was searching for such files for FreeBSD, is there no such thing? Like, to launch an installer?
wiki.debian.org
InstallingDebianOn/Seagate/PersonalCloud - Debian Wiki
Various How-to-install Debian on some given hardware (computers, architectures, embedded and other odd devices)