Man, I give up. I can't even export the file now. It just gives me an error. Even after merging most of the file down from over 2 GB to 368 MB, but it's not working. This is so weird. I've never had this problem EVER. I've been using PS since like 95 or so. I've made complex maps 10,000 px x 10,000 px with no issues on this PC.

I'm open to suggestions on how to shrink the file size without loosing detail or how to increase performance with Photoshop (sorry, I know this isn't PS customer service).