The vast trove of copyright work has to refer to training. ChatGPT is likely on the order of 5-10TB in size. (Yes, Terabyte).
There are college kids with bigger "copyright collections" than that...
There are college kids with bigger "copyright collections" than that...
Disk size is irrelevant. If you lossy-compress a copyrighted bitmap image to small JPEG image and then sell the JPEG image, it's still copyright infringement.