I use the usb hub to connect all my USB stuffs. It proves that this usb hub with external power supply can support my external usb 2.0 harddrive(no internal power supply), webcam, mouse and printer. Actually I also use the hub as a power supplier when recharging my bluetooth headset.But one thing you need to know that if you connect one USB 1.0 equipment in the hub, then the speed of all other usb stuffs will be lowered to USB 1.0. I have no idea why it can work in a sperate way. Anyway, in all the hub is still a good one. I have only 3 usb port in my T61. I desperately need it.