I just want to add to the discussion, what most folks don't realize, is that the card reader is typically the knife that kills an SD card, if it wasn't a scam card to begin with. Dirty contacts in the card reader or a USB port that has not been cleaned regularly is a very common cause of corrupting a memory card. The worst part is, the usual actions one may take is actually not what they are supposed to do, and they unknowingly kill a card.
One example is, if you plug in a card reader to a computer, and you see gibberish and large GB files and folder names like in OP's screenshot, at that point the card is not dead. It just cannot be read properly. But the moment someone does a scandisk or error checking like the tools in windows, that's what kills the card as Windows will attempt to fix it, but it can't fix what it can't read, therefore ruining the sectors.
These experiences is what caused my brother and I to buy not-so-cheap card readers from a reputable manufacturer, and regular care of this card reader has kept me error free for quite some time. I know it's too late OP, but I would look into your card reader if I were you. Too many times I've been burned by those 4 in 1's, getting a card reader dedicated to SD is always the preferred choice.