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Hi. I have been having an issue with my photoshop scratch disk full. My disk drive storage is left with 233gb and when i start using photoshop, it went down to 162gb, and when i add pictures to my canvas it went down further to 52gb and will have a scratch disk message. I've been trying ways to fix it through purging the cache, temp files, delete storages in my disk, decrease the performance memory usage but still continues the same. What is the issue? How to solve this?
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If you work with large files (and many files open), it's perfectly normal that Photoshop needs 200 - 300 GB, or even more, for the scratch disk.
The scratch file contains all history states for all open documents plus overhead. That's much more than any RAM you may have installed, and orders of magnitude more than individual file sizes. All that data has to go somewhere.
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Not a bug, just the way PS works. But see:
https://helpx.adobe.com/photoshop/kb/troubleshoot-scratch-disk-is-full.html