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If you’ve been using Adobe Photoshop and suddenly see an error message that says “Photoshop scratch disk full,” you’re not alone. This is a common problem that can interrupt your workflow, slow down performance, or even prevent the program from launching altogether. In this comprehensive guide, we’ll explain what a scratch disk is, why the “Photoshop scratch disk full” error occurs, the different types of scratch disk issues, and how to fix and prevent them. You’ll also find helpful FAQs at the end of the article.
When you run out of memory (RAM) while using Photoshop, the program temporarily uses hard drive space to store data. This temporary storage is known as a scratch disk. If the drive Photoshop uses as a scratch disk becomes full or doesn’t have enough space, you’ll see the “Photoshop scratch disk full” error.
Photoshop creates temporary files during tasks like applying filters, using brushes, or working with large images. These files can accumulate quickly, especially if your designated scratch disk has limited free space.
Understanding the different types of scratch disk problems can help you diagnose and resolve the issue more effectively:
This occurs when Photoshop tries to launch but doesn’t find enough free space on the assigned scratch disk. It can prevent the application from opening altogether.
If you’re working on a large project or using resource-heavy tools, the scratch disk may fill up mid-session, causing errors or slowing performance.
Photoshop allows multiple drives to be used as scratch disks. If all selected drives are full, you’ll get an error indicating that multiple scratch disks are full.
Photoshop may leave behind temporary files even after you close it. These hidden files can consume valuable space over time.
Several common reasons contribute to this error:
The most immediate solution is to delete unnecessary files or move large files to another drive to free up space. You can also empty the Recycle Bin or Trash.
You can switch the scratch disk to another drive with more available space:
To remove temporary files stored by Photoshop:
This helps reduce the space being consumed by cached data.
Temp files usually follow this naming format: Photoshop Temp####. You can find them in these locations:
Photoshop Temp####
C:\Users\[YourUsername]\AppData\Local\Temp
/private/var/tmp/
Delete these files after closing Photoshop.
If you’re using a traditional hard disk drive (HDD), defragmenting can help Photoshop access scratch disk space more efficiently.
Allocating more RAM can reduce reliance on the scratch disk:
If your internal drive lacks space, an external SSD can serve as a fast and effective scratch disk.
A scratch disk is temporary storage space on your hard drive that Photoshop uses when your system runs out of RAM.
This happens when the assigned scratch disk has no available space, usually due to temporary files, large projects, or insufficient disk size.
You can clear it by freeing up space on your drive, changing the scratch disk location, purging the Photoshop cache, or deleting temp files manually.
Yes, using an external SSD with plenty of free space is a good way to extend your scratch disk and improve performance.
At least 20 GB of free space is recommended, but 50 GB or more is ideal for large projects.
Regularly clean your system, assign the scratch disk to a larger drive, increase RAM usage in Photoshop, and close unused files and applications.
Photoshop temp files are typically found in system temp folders. For Windows, check C:\Users\[YourName]\AppData\Local\Temp, and for Mac, look under /private/var/tmp/.
C:\Users\[YourName]\AppData\Local\Temp
Yes, as long as Photoshop is closed, it’s safe to delete these files to free up space.
The “Photoshop scratch disk full” error can be frustrating, but it’s usually easy to resolve with a few simple steps. By freeing up disk space, optimizing your Photoshop settings, and regularly clearing temp files, you can prevent this issue from disrupting your work. If you frequently work with large files or advanced editing tools, consider dedicating a fast, high-capacity SSD as your scratch disk to keep your workflow smooth and efficient.
This page was last edited on 12 May 2025, at 2:46 pm
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