1. The image cannot be saved. Prompt: It takes energy to complete the "Save" command because there is not enough memory (RAM), as shown below:

Unable to set Edit-Preferences-Performance Settings!

Win+R keyboard, enter "Regedit" in the "Run" window, open the registry editor, find the computer -HKEY _ Current _ User-Software -Adobe-Photoshop- 120.0, and create a new DWORD(32) bit value with data name: OverridePhysicalMemoryMB and numerical value.

Restart the software and you can use it normally!