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External hard drive not appearing?

Community Beginner ,
Mar 11, 2019 Mar 11, 2019

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I was checking my scratch disc in PS preferences & noticed that my external hard drive which I use as my primary scratch disc is NOT showing up in the scratch disc preference section. I use one empty external hard drive as my #1 selection for scratch disc. #2, & #3 are other  external hard drives. I opened up the empty hard drive  to be sure it didn't crash & it did open. My question is : Why does it not appear in the scratch disc section while the other drives do appear?

Thanks

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correct answers 2 Correct answers

Adobe Community Professional , Mar 12, 2019 Mar 12, 2019
If you are going to assign a external scratch drive in Photoshop Mac, it must be formatted as Mac OS Extended (Journaled) or it will not show up in the Photoshop Scratch drive list, even if it is showing up in the Finder or Desktop. If it's already MacOS Extended, run Disk Utility First Aid on it.Gene

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LEGEND , Mar 14, 2021 Mar 14, 2021
One thing worth double checking is whether you can create a file on that partition. It might be that Photoshop hides read-only areas.

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Adobe Community Professional ,
Mar 11, 2019 Mar 11, 2019

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Hi Joel.  Are you using Mac or Windows?

[EDIT] I should have asked about Photoshop as well, in case you are using an old version.

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Community Beginner ,
Mar 12, 2019 Mar 12, 2019

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Hi Trevor,     Sorry, I should have mentioned I am using a Mac. Also in the Scratch Discs portion of preferences there are only 3 disc listed. Two external drives & my system Mac drive.

Thanks for the help.

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Adobe Community Professional ,
Mar 11, 2019 Mar 11, 2019

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If Windows, you may need to assign it a drive letter in Disk Management:

assign+it+a+drive+letter+in+Disk+Management

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Adobe Community Professional ,
Mar 11, 2019 Mar 11, 2019

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Bob I had the same thought, but that does not work for me.  Seven of the drives that show in Disk Management are external.  They are all formatted NTFS Basic, but only seven are available for Photoshop Scratch.  There does not appear to be any clues in the Status column either.   Google suggests that file format is the key with OSX, but I don't know how current that information is.

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Adobe Community Professional ,
Mar 12, 2019 Mar 12, 2019

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If you are going to assign a external scratch drive in Photoshop Mac, it must be formatted as Mac OS Extended (Journaled) or it will not show up in the Photoshop Scratch drive list, even if it is showing up in the Finder or Desktop. If it's already MacOS Extended, run Disk Utility First Aid on it.

Gene

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Community Beginner ,
Mar 13, 2019 Mar 13, 2019

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Gene,

Thank you very much, that worked!

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New Here ,
Jun 24, 2020 Jun 24, 2020

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I'm having this same issue with my Transcend external disk.
As I was looking up how to format to Mac OS Extended, it looks like I need to erase the disc in the process.  Is there a way to format without erasing the data on the disc?

 

Jon 

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LEGEND ,
Jun 24, 2020 Jun 24, 2020

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No, formatting always wipes a disk. Don’t forget you need a backup!

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New Here ,
Mar 14, 2021 Mar 14, 2021

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Hi, I tried the suggestion above but my external drive still does not show up in the list of scratch disks.
I created a new partition and made sure it is MacOS Extended (Journaled), ran disk utility first aid on it and I still only see my internal HD listed. See attached screenshots.
Any help is welcome!

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LEGEND ,
Mar 14, 2021 Mar 14, 2021

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One thing worth double checking is whether you can create a file on that partition. It might be that Photoshop hides read-only areas.

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New Here ,
Mar 14, 2021 Mar 14, 2021

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That worked!
I opened PS, saved a file to the new partition and now the drive magically appears in teh list of scratch disks. 
Didn't change any read-only settings, so it seems a bit of a UI bug to me, but thanks a lot, this solved it!

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Community Beginner ,
Oct 12, 2021 Oct 12, 2021

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I did the same thing still no show.

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New Here ,
Jul 23, 2021 Jul 23, 2021

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I have Photoshop on Windows 10.  My external hard drive does not appear in Scratch Disks. I tried uninstalling and reinstalling Photoshop.  No change.  I need to store on the external hard drive ("E" drive) because scratch disks are full on the internal hard drive.

 

 

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New Here ,
Jul 27, 2021 Jul 27, 2021

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I had save a Photoshop file from within Photoshop onto the external drive first, then it appeared in the scratch disk list.

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