Is the PNPDeviceID unique
问题 I wonder if the PNPDeviceID of an USB drive is unique (at least a charge of identic devices) and if the ID does not change. Thanks in advance. 回答1: As far as I know -- No. For example, "USBSTOR\DISK&VEN_LG&PROD_USB_DRIVE&REV_1100\AA04012700014149 &0 " - is a device id of a usb stick. For all such given usb sticks device id will be the same. But Windows adds an instance id of device (" &0 "), so it can distinguish them. If you plug two same usb sticks the device id of each of them will be