I read in Install Debian on WD My Cloud home - #170 by juniornerd
"The easiest way is to download OMV from Fox_exe file archive (fox-exe.ru) 13. Extract it to a USB stick (FAT formatted, format with windows, not linux). Then you put that into the USB port and reset. After some Minutes you should be able to access http://wdnas 9
Then you can log in via SSH and follow the guide at Lötzimmer: Debian on WD My Cloud Home single-bay (MCH) - part 1 (loetzimmer.de) 24"
DEbian 9 + OMV 4 seems easy: Fox_exe file archive
Wouldn’t it be easier to create a 7z file with debian buster + Alex N kernel + all fixes (led,etc…) + OMV 5 like foxexe.ru did?