Fix could not complete your request because the scratch disks are full -my Photoshop writes this everytime I want to create new file, what might be problem and how to solve it.
Your startup disk is locked here, because no other drives are available. Is your external SSD connected, and formatted to APFS?
Your local disk (C:) is about to be full. Photoshop needed some amount of space on the local disk. You need to either move some heavy file from C: drive OR delete some unnecessary files and also empty your recycle bin.
Minimum free space required for a scratch disk should be 6 GB in Photoshop desktop. However, this is the minimum space that Photoshop tries to keep 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. So, if the free space in your scratch disk is 10 GB, available space that Photoshop will consider in the scratch disk is 10 – 6 = 4 GB, which may/may not be enough for the current operation being performed.
- If you make small changes only, you need a minimum of 10 GB scratch disk space for Photoshop (with default preferences, brushes, patterns, etc). It is recommended to have minimum 20 GB of free space on your OS hard drive while working with Photoshop. Additional free space may be required based on the file type you’re working with.
- If you make large changes to dense pixel layers (that is, using several filters on complex background images or many edits to large smart objects) you could need as many times the size of the original file as there are history states.
macOS: APFS or macOS Extended (Journaled)
Windows: NTFS, exFAT, FAT32
Drives not recommended for scratch disk
- Thumb drives
- Any USB-2 drive
- NTFS formatted drives on macOS
- For best performance, connect the scratch disks to a compatible port that has the highest bandwidth limit of all the available ports. The bandwidth limits for various ports are as follows:
Thunderbolt = 40GB/sec
eSATA = 600MB/sec
PCIe = 500MB/sec
USB3 = 400MB/sec - To improve performance, set the scratch disk to a defragmented hard disk that has plenty of unused space and fast read/write speeds. If you have more than one hard drive, you can specify additional scratch disks. Photoshop supports up to 64 exabytes of scratch disk space on up to four volumes. (An exabyte equals 1 billion GB.)
- If your startup disk is a hard disk, as opposed to a solid-state disk (SSD), try using a different hard disk for your primary scratch disk. An SSD, on the other hand, performs well as both the primary startup and scratch disk. In fact, using an SSD is probably better than using a separate hard disk as your primary scratch disk.
- Scratch disks should be on a different drive than any large files you are editing.
- Scratch disks should be on a different drive than the one your operating system uses for virtual memory.
- RAID disks/disk arrays are good choices for dedicated scratch disk volumes.
- Defragment drives with scratch disks regularly.
