Not able to use SanDisk SSD as Scratch Disk

[BarkeeperCC]

Hey everyone, I’m hoping someone can help! I bought the SanDisk Extreme Portable SSD (2TB) today and want to use it as a scratch disk in Photoshop on my MacBook Pro, but it’s not being recognized by Photoshop.

Here’s what I’ve tried so far: • System Preferences > Security > Privacy > Full Disk Access, enabled for Photoshop. • Renamed the drive to ensure there are no spaces in the name. • Restarted both my MacBook and Photoshop multiple times. • Ran Disk Utility > First Aid. • The file system is ExFAT. Any ideas on what could be wrong or what else I can try? Thanks in advance!

[Ged_Traynor · Accepted solution]

@BarkeeperCC have a look here

https://helpx.adobe.com/ie/photoshop/using/scratch-disks-preferences.html

[Lumigraphics · Accepted solution]

ExFAT will not work. Use Disk Utility to reformat it as APFS.