rin

I can not reiterate enough just how easy it is to "clone" your modified emmc, or microSD card OS, ... into an image file that you can easily restore with (balena)Ethcher afterwards, and all withiin Linux.
 
1:/ you'll need a USB-card-reader-adapter.
2:/ no matter how your USB-reader card reader sees your emmc, microSD card, ..., it'll most likely be mounted on a /dev/sda1 partition.
3:/ sudo dd bs=4M if=/dev/sda of=~/tmp/armbian_odroidc4_11_01_2025.img
(you don't dd the partition, you dd the drive).
4:/ (optionally) sudo xz -v armbian_odroidc4_11_01_2025.img  
(this will take some time).
 
...and that's it, ... and you know the rest.

I can't even imagine the amount of work involved on both sides of the (debian) development fence, as well as the admins, mods, community contributors, ..., here, that help make Armbian a viable SBC (ARM) whatever OS. -and here's to RISC-*, and let it not be too encumbered.
My "Armbian_24.11.1_Odroidc4_noble_current_6.6.60-kisak.img" works very well on my lowly Odroid-C4.
I don't know your names, but
Thankyou all.