Turris Flash fault?

My TO stopped working properly as btrfs inode errors appeared. I tried doing a 4 LEDs: Re-flash router from flash drive with https://repo.turris.cz/omnia/medkit/omnia-medkit-latest.tar.gz

TO doesnt work anymore completely. mmcblk0p1 get properly formatted without error message, but when mounting there is an error: Mountin /dev/mmcblk0p1 failed : I/O error

Is there anything i can do? i would have a mSATA drive: is it possible to boot from there?

Duplicate it of the Flash Memory weared out -> trying to boot from msata