It looks very similar to my very old card.
Have you tried reformatting ypur sd card with that Panasonic tool.
http://av.jpn.support.panasonic.com/support/global/cs/sd/download/
Good luck.
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much