[Malcolm G]

You don’t want to save or transfer the whole drive, that would include the operating system.
Open it in the dialogue box to read files and then just save, or transfer, the image files to a location on the host machine. Perhaps set up a new sub file to keep them separate.
Simplest foolproof method is to have both the new file window and the usb window open on either side of the screen then drag and drop batches of files over.