I've just spent the last hour looking for something and I'm almost convinced it doesn't exist. It's the most obvious thing in the world. I want to share 3-4 external hard drives between my iMac and my Macbook. That means switching them back and forth as needed. Presumably there would be a hub that would allow me to do this, but I can't find a single thing. Preferably it would be USB 3.0. Yes, there are USB hubs that connect to one computer. There are switches that allow two computers to connect to one device. But what about having both, two computers connected to a hub of, say, 4 devices. At the very least, does anyone know of a setup that will accomplish this, even if it is a combination of two devices. It's just insane that I can't find this. If anyone has a solution, I would greatly appreciate it.