My path is where my uncompressed screenshots are, so it's working for me, but I've tick the "save an uncompressed copy" option.
On the other, games specifics, folders, I've only the jpeg ones.
Faststone Image Viewer is a light little free app where you can convert these large uncompressed PNG's to visually lossless JPG and save a huge amount of space. Set JPG quality to 97%.
It's a bit of extra work, but if you take a lot of screenshots, it's worth it.