I have buy MECOOL M8S Pro+. I would install libreelec. Its possible USB port to boot the box or only sdcard? Thanks
New M8S Pro+ boxes hav no reset button so....
From the S905X Install thread: (you may need to issue a "su" command before reboot update)
- Terminal Emulator: boot to Android, insert SD card/USB drive with LE, install Terminal Emulator app (either from Google Play or APKMirror), run it and type reboot update. Your box should reboot to LE.