Okay here's my results with that command:
I'm trying to avoid adding complexity to this process, such as remembering to go to the USB menu and select from the half dozen or so thumb and hard drives attached to this PC (they don't show up with volume label--just a bunch of "U3 Cruzer Micro" entries and I must guess which one is my Z drive).
It seems that accessing a drive that has been made accessible by the integration features settings should not be so difficult in a command shell.