Well technically it isn\'t really an expansion bay at all. That was all just a cover story so they wouldn\'t get in trouble. Besides, they knew that those "in the know" would recognize it for what it was immediately anyhow. Sony knew what we American and European gaijins wanted and it wasn\'t a harddrive. It\'s really a stash box. See, ya put yer weed in the back and cover it up so noone can see it and bust you/bogart it. Then when you turn on the PS2, it\'s processor gets so hot that it burns that weed while in the box (caution, running the PS2 without a bag of green in the back can cause overheating problems) and the smoke gets ventalated out those huge vents in the front so that you can do a clam bake with yer buddies while playing your PS2. (Passing the pipe while trying to handle the controller is very annoying and can screw up your game)