Unable to import photos from Nikon Z 7 via USB

My goal is to import photos to my 500GB My Passport Wireless SSD from my Nikon Z 7 without taking the card out of the camera. On the page listing camera compatibility (https://support.wdc.com/knowledgebase/answer.aspx?ID=11737&s=#wirelesspro), the Z 7 is listed.

When I connect the camera, it does show up as a USB device. However, if I browse the contents, there are no images, and importing from USB leaves me with an empty folder. I have seen some errors saying that there was an error connecting to the camera.