Slight problem: I've downloaded 398 images so far, and it takes 92 MB. I don't know the exact number yet, but it looks like there are about 800k images in total. So give or take 200 GB 
Maybe you can compress them or convert to other image type to reduce size and still keep the same look like of original images.I like the idea of replacing images if possible, or forum will soon look like ''war'' zone
I have an immediate feature request: add a couple of field for “height” and “width” attributes.
Good idea, I am supporting it but this should be only with keeping aspect ration same.