In fact, Photoshop will often display the “Scratch Disks Are Full” error, before the hard drive is at 100 percent capacity. If your hard disk is full regardless of the reason, the logical approach is to delete some files. Make Some Room on Your Primary Hard Drive As such, you can jump to any method and start there and even combine it with one of the others on the list. The below methods are in no particular order and aren’t exclusive to one another. How to Fix the “Scratch Disks Are Full” Error in Photoshop As such, there are a few methods you can carry out to resolve the issue. When you see the “Scratch Disks Are Full” error, this means that the scratch disk you assign is either completely full or (more likely) close to capacity.
By default, Photoshop uses the same hard drive as the operating system.
While it depends on the program itself, Photoshop uses the scratch disk to store slices of your documents and history panel. You can think of it as “over-spill” for your RAM. A scratch disk is hard disk space that is temporarily allocated to any given running application to store transitional data.