Earlier quoted context omitted.
> The malware used in their operations, dubbed EquationDrug and GrayFish, is found to be capable of reprogramming hard disk drive firmware. Wow. We really are f----d all the way down the stack.
SD Cards have a full 32-bit processor on them. You can find videos on hacking them. In theory, you can re-label a 32GB card as 16GB, create a 16GB journey and write two copies of everything stored to it. Then you just steal the card back and get all the data off it.
If you're stealing hardware, the only thing you're not capable of already is (necessarily) being able to decrypt it. So this would apply to any unencrypted SD card. Not terribly effective use of the hack.
A better one would be to do so with one of those WiFi SD cards[0] and transmit the data over the network. You could just read it directly from the card and place deleted files into your buffer when you overwrite them, and hope they don't delete more than your buffer's size of data before you can upload it.
[0]:https://en.wikipedia.org/wiki/Secure_Digital#Vendor_enhancem...