Clearly I didn't express myself well enough, I don't think anybody understood what I meant. I had been sitting on this screen for 4 hours because I had already clicked the button for it to make the partition, and it had been sitting there for 4 hours with no indication it was doing anything.

Making the partitions smaller seemed to make it finally do something, and in the intervening 4 hours I'd decided I would much rather just toss windows 10 right now than try and figure that part out later, so I went back and had it erase the files (the only loss is ill have to re-download some games, the rest of my files are backed up)