ok, it works but I think it is not exactly correct.
Your image shows a generic class GUID for all USB devices (##?# USB VID # ...).
Better to use a GUID for a specific class of devices.
Search again to find something like # #? # IMAGE # VID_XXXX&PID_XXXX and uses its GUID.
Maybe I'm wrong, but I think for read / write operations you must use a more specific GUID.