Here is the scenario:
I have TWO External TB drives. They are both plugged into a Powered USB Hub. That Powered USB Hub is plugged into the back of my Airport Extreme. I can only see one. They have both been formatted with OS Extended (journaled). Each are visible if only ONE is plugged in (i.e. TB_A can be seen if just TB_A is plugged in, and TB_B can be seen if TB_B is the only one plugged in)
Does anyone have any ideas? So frustrated because it doesn't make much sense.