How to install Debian in a WD MyCloud EX2 Ultra: Definitive edition

if [ -e /sys/class/leds/wdmcex2u\:hdd1\:blue/trigger ]; then
    echo gpio > /sys/class/leds/wdmcex2u\:hdd1\:blue/trigger
    echo 1 > /sys/class/leds/wdmcex2u\:hdd1\:blue/inverted
fi
if [ -e /sys/class/leds/wdmcex2u\:hdd2\:blue/trigger ]; then
    echo gpio > /sys/class/leds/wdmcex2u\:hdd2\:blue/trigger
    echo 1 > /sys/class/leds/wdmcex2u\:hdd2\:blue/inverted
fi
if [ -e /sys/class/leds/wdmcex2u\:hdd1\:red/trigger ]; then
    echo ide-disk1 > /sys/class/leds/wdmcex2u\:hdd1\:red/trigger
fi
if [ -e /sys/class/leds/wdmcex2u\:hdd2\:red/trigger ]; then
    echo ide-disk2 > /sys/class/leds/wdmcex2u\:hdd2\:red/trigger
fi

		sata1-red-led {
			//label = "wdmcmg2:red:hdd1";
			color = <LED_COLOR_ID_RED>;
			function = LED_FUNCTION_DISK_ACTIVITY;
			function-enumerator = <1>;
			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "ide-disk1";
			panic-indicator;
		};
		sata2-red-led {
			//label = "wdmcmg2:red:hdd2";
			color = <LED_COLOR_ID_RED>;
			function = LED_FUNCTION_DISK_ACTIVITY;
			function-enumerator = <2>;
			gpios = <&gpio1 20 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "ide-disk2";
			panic-indicator;
		};
		sata1-blue-led {
			//label = "wdmcmg2:blue:hdd1";
			color = <LED_COLOR_ID_BLUE>;
			function = LED_FUNCTION_DISK;
			function-enumerator = <1>;
			gpios = <&gpio1 21 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "gpio";
			led-pattern = <48 0>;
		};
		sata2-blue-led {
			//label = "wdmcmg2:blue:hdd2";
			color = <LED_COLOR_ID_BLUE>;
			function = LED_FUNCTION_DISK;
			function-enumerator = <2>;
			gpios = <&gpio1 22 GPIO_ACTIVE_HIGH>;
			linux,default-trigger = "gpio";
			led-pattern = <58 0>;
		};

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i don't think i did, it's my first time with this kinda things. Should be something with kwb extension? is the backup unique for any machine or maybe i could take the backup for the ex2 ultra from someone?

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i just used bubt command to flash the uimage to nand, i wanted to flash back the original uboot image to try another way, cause for some reason i couldnt enable port 1 again after i flashed patched uboot. But i picked the wrong one. after the reset, and from that moment i couldnt do anything at all