Just like semi-pregnant there is no such thing as semi-bricked.
A SD card cannot be “updated”, so you are not providing specific credible information regarding your issue. Is it asking you to update the files on your SD card? I doubt it. Is it asking you to get a faster one? I doubt it.
Is it asking you to install the ExFat update? Probabaly. If so, you chose to not install the ExFat update when you upgradedthe firmware using ChoiDujourNX. It is a binary decision you must make. Run it again and make the correct choice.