I was hoping you wouldn’t have to either .
And with (still pricey) 256GB sticks, I am afraid you don’t have another one just laying around you could temporarily abuse for the purpose.
That said, it IS very good practice to always have at least one spare copy of a USB stick with you at all times. While not as bad as they once were, they still DO sometimes go south.
Back on-topic: I have to say that re-reading your OP, it seems that I jumped to conclusions on my previous replies, thinking some stuff didn’t get transferred. But you did say that you can see the tracks of the K-Z artists in file view on the actual stick, meaning they are there. Since the MCX8000 uses the index that Engine makes for searches, it would imply that the index is somehow not entirely correct. There are some options to update database and such, but not quite sure if you can tell it to just check/fix the index on the stick.
I am an old IT hand from a former live and I have learned to not spend too much time trying to find the core cause of a problem and fixing it unless it’s a permanent and/or reproducable error. Meaning that all the time you put into trying to make the current situation work, could be wasted if you just wipe the stick, move your crates to it after it’s reformatted (it’ll just be the time needed to copy the tracks, no re-analyzing involved) which will be done while you sleep and the outcome turns out to be that it works. It will remain a mystery why it didn’t work the first time, but I’d rather have the mystery than putting all this awake time into solving a one-time fluke problem.
Just my two cents and just trying to help out.
If anybody has a different/better idea, I’d be very interested to hear it and learn something new.