I'm exactly in the same situation. Could you solve the issue?
Hi. Did you manage to root the SD 256GB ? What firm were you on? Could you please explain the procedure you followed?The only thing you'll lose is Samsung Pay and Secure folder, but even those I believe are recoverable, as someone said to me. Other than that, tripping knox gives you a forever 0x1 meaning that your warranty is void and irreversible. I also made the decision to keep the S22 (SD variant, even if I'm in Europe) just to root it and screw with it. I even put the cases away and I now use this thing naked, like never before. I hate it so much because of the small battery that I don't even care anymore if I drop it and crack it. Going back to a Pixel 5 would be the cheapest and best way for me if that were to happen. But I digress.
The only Samsung apps I'm using are the Battery Tracker, battery guardian and the booster one.
Anyway, I can't wait to open it up and see what I can do about the battery. Maybe I can fit a bigger one by doing some work around it. Future project
Yes, and you can update after root(same process as rooting but using HOME_CSC instead of CSC to keep data) and bootloader can be relock again
Your warranty is now void. If you root your device, Your KNOX status will be tripped. You can still pass the safety net after you root if you follow the instructions. I am not responsible for bricked devices, dead SD cards although it is not really possible Please do some research if you have any concerns about doing this to your device