Clean OS (Debian), OpenMediaVault and other "firmwares"

[ToTo]

I successfully installed Debian 9 and OMV 4 on my WD My Cloud Mirror Gen2, see

WD My Cloud Mirror Gen2 running Debian 9 and Openmediavault 4

I’ll make a long story short. After I was dissatisfied by OS 5 on my WDMC Mirror Gen2 I was installing DSM 6 on the device based on this thread: But after a few days it crashed. So I managed to activate the original WD rescue and installed OS 3 again. From there I installed Debian Stretch based on this: https://fox-exe.ru/WDMyCloud/WDMyCloud-Mirror-Gen2/ followed by OMV 4. By accident I installed Debian 10 (Buster), but I was unable to install OMV then. If you do the same, take care and…

I currently running kernel 3.10.70.

What is the latest kernel I can use?