[HELP] How To Install OSMC On Raspberry Pi 2 Manually

Man, i’ve tried to do it with 3 different Desktop computers / 3 Different SD cards / 2 Different USB Flashs / 2 Different Raspberry Pi-s

They work perfectly fine until I’m using them with Ubuntu-Mate / Open-elec / RuneAudio & Retro Pi installed on.
But just when i’m trying to install OSMC, i face with problems. (as i said here)

it’s 3 days that i’m trying to install OSMC on one of my devices, but it always finishes with a “fail”.