SD Cards - Sandisk vs Kingston Reliability

Correct - the camera does include the extra folders, however I'm a little confused as to the relevance of this? Having or not having those folders shouldn't cause a card to become corrupt, unusable, and unformattable in every device tried?

These two cards I have are definitely corrupt - it's not just a matter of a folder missing, which is why I was wondering what other people have experienced with both Sandisk and Kingston cards.