Can crypto locker spread to other attached media?

My sister just got her computer infected with the wonderful crypto locker. She also has a memory card with important photos on them, that "may or may not have been plugged into the computer", when she got this virus. I was going to at least look and see if the card is encrypted, but I'm very weary of this. I know that the virus will encrypt any attached local media. But is it possible for the virus itself to spread to those devices? If I plug this memory card into another computer, will it infect that computer?

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