Trick, every possible setting of the ESC is adjusted through the radio. Just like with programming card but better as larger screen is available. I think it is even better than the Sanwa variant (Super Vortex Zero + RX 472) as all is not done through the AUX functions where you need to know where you are in the menu as the settings are under AUX and MODE. The x-8n shows the screens as shown in the manual for GM GENIUS PRO.

Steffen, I am in the same situation as you - the SD card logging is mentioned but explained nowhere. Here is what is my experience.
I was curious what is in the supplied SD card. There are few folders - Firmware, Log, Voice, Models. The "Firmware" contains fw in English, French and German. The Voice contains about 8 files for different language voices for the voice announcements. The log and model are empty.
I have plugged in the SD card into the x-8n, copied some voice files to check how they work and left the card in the slot. I have searched for any setting which could be related to Log on sd card with no success.
Then I've used the transmitter for some VRC sim and noticed the SD card icon looks as if something is recorded on the SD. I've checked the SD card and there are several log filed in the log folder. Why and how the log started, I have no idea. I tried to browse the files with the graupner log viewer and this is what is in:








Looks each frame is logged, including inputs. A 1 hour log is about 9MB.


Seems thex-8n has great potential and opportunity to improve the documentation and software..