WD MyCloud Gen1 have software with non-standart memory page size (64kb vs normal 4kb), so its not compatabile with software from official debian distro.
I make my own distr with software, recompiled for this firmware: Repository with software worked on v4 firmware
WD MyCloud Gen2 dont have any OS inside, just Busybox + few tools. So there is no Apt or other package managers. But if you need something - use Chroot’ed Debian and install anything you want inside.
