I have a similar frustrating problem. I have Elements 2022 and every Google and YouTube solution says it's an easy fix. But when I get to the tutorials and compare them to what I have on my screen, it's just not there. Plus, I'm fairly computer illiterate so instructions starting with a lot of assumptions do nothing to help me. I use PS Elements mainly for downloading off of memory cards and for organizing the pictures. After a recent trip to foreign country, my download of 1600 images was interupted by the filled sctatch disc notice. Whaaaat? So, I'm thinking get the images off the memory cards=priority #1. So, I can either empty the scratch disc of temp files or I can set up another drive. Again, what the tutorials show and what I see never meet. Adding the drive requires me to see the drives in use. I have three drives in my computer, C, D, and E. C is full. D and E are virtually empty yet they don't show up on the scratch disc preferences. So, I cannot prioritized them. Thankfully I have no deadline but by now, I should have the images available for sharing.