Hi, that is indeed correct yes. It is not as simple as making folders, you should check out this tutorial ( here ) for how to make ymt files, so each ymt file can have a max of 127 items in each section before it starts not working.
Just don’t forget to also edit the current ymt file to remove the extra slots above 127.
Once you’ve gone through the tutorial and have done things like explained in the tutorial, if you still need help, you can ask me here.