Photoshop uses a lot of RAM. It will take as much as you can throw its way, and then some more. As a way to use ‘more’ RAM than a computer had available physically, the developers took to creating scratch disks on your Hard Disk Drive (HDD), as an extension of the data that Photoshop held in RAM.
HDD
Simple SSD Configuration Guide for Photo-Editing Desktop Workstations
It’s 2020, and you should definitely be using Solid State Drives (SSD) for your photography workflow to be efficient in ANY photo editor. However, this is especially important for RAW image workflows in Adobe Photoshop Lightroom Classic, and Adobe Photoshop CC.
If you’ve only been using Hard Disk Drives (HDDs) until now, it’s time to make the switch. Here’s how you can switch over the right way.