My point is: Joe Average takes some photos with his camera, finds that he’s out of space on his SD card, pops it into his MacBook to transfer over a couple of g

My point is: Joe Average takes some photos with his camera, finds that he’s out of space on his SD card, pops it into his MacBook to transfer over a couple of good photos and delete the rest, and when he plugs it back into the camera it’s still full. Finder doesn’t show anything, and neither does the camera’s image review function. I don’t think that looking to empty the Trash is an intuitive next step, since it seems to me that the Trash wouldn’t be on the SD card.