How to use External Hard Drive for Photoshop (avoiding "scratch disk full" notifications)

Question

Hello everyone! I can't use Photoshop anymore because it says that the scratch disk is full. I have been researching and it is obvious that it's because I need more memory in my hard drive in order to use the program. I am planning to buy an external hard drive in order to solve it; nonetheless, I am worried that Photoshop won't recognize the hard drive like it has happened to me before. Is this because I should always reformat it for me to finally use it in Photoshop? Or is buying a hard drive for this purpose not the correct solution?

I'm looking forward to your responses!

JJMack · Accepted Answer

It look like your Mac Photoshop is not supporting your external disk for scratch space. On Windows Photoshop supports scratch one external storage like USB3 hard disk. Photoshop does not support USB Flash drives. Windows regards these as removable storage. Photoshop most likely does not think movable storage is appropriate for scratch space.

If you add a external hard disk or SSD you mac OS will see it as perminate storage and Photoshop will show they are available to be configured for scratch. You should not include your boot disk, When I start PS 8GB of scratch space is used right away. You system will mot rune if your boot disk fills. You really need to free up space yous system disk.

I have seen PS use 100GB of scratch on my system for some batch joobs

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