I was wondering if it were possible to hook up an external hard drive to two computers. My laptop is running Windows XP and my desktop is running Vista. I would like to be able to save everything on my external without having to pull the USB plug out of one machine to connect to the other. Is there a switch that I could purchase that could do this (almost like a KVM switch does for the monitor and keyboard?) I am not looking to access the same documents or use both machines to access the HD at the same time, just looking to backup without the pain of reconnecting wires all the time. Thanks in advance.