Can't save TIF or PSD in Photoshop 2020 on Mac OS

[GlitchoftheUniverse]

I've been trying to save a file for a solid 3 hours and Ive been unable to save 1 file onto my hard drive. I have also been trying to export the image but photoshop keeps telling me that my file exceeds the 2 or 4 GB limit. I keep checking my file and it barely cracks 1 GB so I don't know what's going on. 

Here's an image from my sceen.

[jane-e]

Can you save it as a PSB? What size is it after you save?

https://helpx.adobe.com/photoshop/using/saving-images.html

~ Jane