OK, thanks.
I see some people said it works on TWRP too and the install proccess succeeded.
where can i find a guide to install 4ext from TWRP ?
thanks
after installation you have to flash the boot.img of the rom manually via fastboot command in case you are on S-ON
the command is fastboot flash boot boot.img
if you want 4ext recovery you have to ask in your device's thread
then when you flash 4ext enable smartflash from it exactly before flashing the rom
done