Here is another one with the same problem on a iPOD which also use
USb mass storage :
" IPOD - It will only work if I boot up the computer with it attached. Actually every device will work if I do this, but it will crash the computer if I try to take it out or remove the USB device from "Safeley Remove HArdware". SO as for a Bluescreen of death.. that is rare. However the problems will hang the computer and I will have to do a hard reset or power down."
That is exactly what happens to me . I wonder if i should ask Hp about it