This is not recommended. https://docs.armbian.com/User-Guide_Getting-Started/#flash-to-sd-card

I built Debian 13 (Trixie) branch v20251014 running Transpeed-8k618t and tested it for general use. The system ran smoothly, so I started testing Bluetooth and the included IR remote control. Bluetooth doesn't detecting a signal. I've read in previous posts about this and found that Bluetooth still doesn't compleworking. Is this correct? IR remote control works properly when used image on an sd card. But when installed to emmc from image of sd card and ran it. IR remote doesn't work at all. I've tested it several times. Does anyone else have the same problem as me?

btrfs on Helios4 is now on by default and there is a uboot-btrfs extension to easily enable this for other boards or even at compile time.

With the latest changes in Armbian and most importantly the update of u-boot to v2025.10 for Helios4, it is now possible to boot SATA and USB from u-boot flashed to SPI NOR flash, with the dip switch set to SPI boot mode. This even includes booting straight from u-boot to btrfs now.

Yes, give me a couple days as I am in the middle of project.