Change Photoshop Scratch Disk To External

By | 21/10/2022

Larn how to prepare and manage scratch disks in Photoshop.

What is a scratch disk?

A scratch disk is a hard disk drive or SSD used for temporary storage while Photoshop is running. Photoshop uses this space to store portions of your documents and their history panel states that don’t fit in the retentivity or RAM of your machine.

By default, Photoshop uses the hard drive on which the operating organization is installed as the primary scratch deejay.

What is scratch disk

If you encounter a ‘Scratch disk total’ mistake, information technology oft means that your difficult bulldoze (or drives) used as scratch disk is (are) running out of storage infinite required to perform a task.

How to ready your scratch disk preferences

You lot can tweak scratch disk settings in thePreferences > Scratch Disks section.

free up space for scratch disk to perform optimally

  1. ChooseEdit > Preferences > Scratch Disks (Win) orPhotoshop > Preferences > Scratch Disks (Mac).

  2. In the
    dialog, select or deselect the agile check box to enable or disable a scratch disk. To change the scratch deejay order, click the arrow buttons.

  3. Click
    OK. To apply the changes, restart Photoshop.

If Photoshop 2019, or earlier, cannot launch considering the scratch disk is full, hold downwardly the Cmd + Option keys (macOS) or Ctrl + Alt keys (Windows) during launch to set a new scratch deejay.

Specify appropriate drive for scratch disk

Specify appropriate drive for scratch disk

How much scratch deejay space exercise y’all demand?

Minimum free space on a scratch disk should be 6 GB for Photoshop desktop. However, this is the minimum infinite that Photoshop tries to proceed free in the scratch disk, and the available space that Photoshop considers in a scratch disk is the 6 GB subtracted from the current free space in the disk. And then, if the free space in your scratch deejay is 10 GB, bachelor space that Photoshop will consider in the scratch disk is 10 – 6 = 4 GB, which may/may not be enough for the current performance being performed.

  • If you make small changes simply, you lot need a minimum of x GB scratch disk infinite for Photoshop (with default preferences, brushes, patterns, etc). Information technology is recommended to take minimum twenty GB of free space on your Bone hard drive while working with Photoshop. Boosted gratis space may be required based on the file type you’re working with.
  • If you make large changes to dumbo pixel layers (that is, using several filters on circuitous background images or many edits to large smart objects) yous could need every bit many times the size of the original file every bit at that place are history states.

Supported drive formats for scratch disks

macOS:macOS extended


Drives non recommended for scratch deejay

  • Thumb drives
  • Whatever USB-2 bulldoze
  • NTFS formatted drives on macOS

Recommended settings for scratch disks

  • For all-time operation, connect the scratch disks to a compatible port that has the highest bandwidth limit of all the available ports. The bandwidth limits for diverse ports are as follows:
    Thunderbolt = 10GB/sec
    eSATA = 600MB/sec
    PCIe = 500MB/sec
    USB3 = 400MB/sec
  • To amend performance, set the scratch deejay to a defragmented hard deejay that has plenty of unused infinite and fast read/write speeds. If you have more than ane difficult bulldoze, y’all tin specify additional scratch disks. Photoshop supports upwardly to 64 exabytes of scratch deejay space on up to four volumes. (An exabyte equals 1 billion GB.)
  • If your startup disk is a hard disk drive, as opposed to a solid-state deejay (SSD), attempt using a different hard disk drive for your master scratch disk. An SSD, on the other hand, performs well as both the primary startup and scratch deejay. In fact, using an SSD is probably better than using a divide hard disk as your primary scratch deejay.
  • Scratch disks should exist on a different drive than any large files you are editing.
  • Scratch disks should exist on a different drive than the one your operating system uses for virtual retentivity.
  • RAID disks/deejay arrays are good choices for dedicated scratch disk volumes.
  • Defragment drives with scratch disks regularly.