OK, so this probably just means that there’s something wrong with the card, but nevertheless, the symptoms are somehow odd: If I try to put the card in the computer’s (Win 8.1 system, tried on two different computers, same symptoms) slot, it is registered, but, for some reason, not mounted—i.e. a device called ‘generic SD something’ is installed, but no drive is added to the computer, and none can be found. Using another SD card works perfectly.
Good, so I thought the card is simply broken; however, once I put it into the camera, I can view the pictures on it just fine. So then I thought, great, I’ll just link the camera to the computer via USB and copy the pictures that way—but again, I get the same symptoms: the device corresponding to the camera is detected, but no new drive is added. Trying a different SD card in the camera again yields the expected behaviour of some dialogue asking what to do with the mass storage media opening, and a drive being added to my computer, which I can then browse at my leisure. Again, the same thing happens on two different computers.
So, what’s the issue here? Why can I see the pictures on the camera, but not copy them from there? Is it just that the card is broken and, well, sometimes this leads to odd behaviour?