Non ex-fat firmware error using online update? (always worked before with the same sd card)

Hi.
I've had my switch working fine with an old version of Atmosphere and my MicroSD card formatted as ex-Fat for quite some time.
Today, I decided to update and I did everything I always do. I take the MicroSD out, replace atmosphere files with the new ones, upload the payload.bin in the dongle, copy the patches, etc.
Then, I power up the console without RCM, in "original" state, and I connect it to the internet and upload it using the upgrade option in the console settings. I don't use Choidujour and never had, I always use the "official" update method (I don't mind about e-fuses). When the console is updated, I disconnect it from the internet, power it off, and then I power it on with the SD Card and the RCM Dongle.
I've always updated this way and no problems until today, when this error appeared:


As I said, I already have my SDCard in ex-Fat working ok before updating to the latest firmware. And if I'm using the official updater, it will always install the exFat firmware, won't it?
I never used choidojour, so I don't know why this error now.
Any help?
Thanks!

 

But I've been using the exFat sd card all this time with no problems. And I had another console and updated that way, without the sdcard (exfat) and with the official update fron the console settings. Never had this problem. Maybe once the exfat driver is installed once, is there forever either I update with the sdcard inserted or not?
Btw, I don't mind banning the console. I don't like online gaming in general. That's why I use the update from the settings, iit's faster than choidojour