What does the No K error code mean?

I am trying to fix an issue with my Rample, I keep getting the error code NoK regardless of how many times I reformat the card and re-add the kits and bin file. It was working fine yesterday, today I noticed a small glitching sound and decided to reformat the card as a way of determining if the extra sound could be eliminated. When I had done that I turned on my rample for a second without the card. I noticed the mistake, saw the big red LED arrow, turned off the rig, inserted the card and got the error code that now persists after three tries reformatting… help please

False alarm, i forgot to remove the kits from the main file folder.