I have an external hard drive and windows xp sais it needs to be formated to be used and well when I install the hard drive into my laptop everything is fine. I also have an Ipod and when it is pluged into my computer it also says it needs to be formated but then I take it and put it into my laptop and voila all is good. Please Help. I also have a printer and it works fine on all usb ports on my desktop computer so I am not sure what the problem is.