I've had a paranoid fear that any magnet would wreck a CD/DVD.
A while back, I got a bunch of Puela Magi Madoka Magica rings and necklaces, the boxes they came in open up like a book. It has a flap down one side which suck back to the box, I know that where the flap sticks to is a magnet as the metal chain on the necklace will sometimes stick to the side of the box when I put it back in.
Currently I have all the necklaces and ring in their boxes far away from any of my games or manga, but I do need to store some in storage.
So can these magnets actually wreck CD/DVD disks or should I just be worried about my hard drives?