Save Screen Capture
How this Rule works
Option-Space captures the full screen; Move File uses the capture file path and defaults to Downloads. Select an unused shortcut and destination.
Configure and try it
Import the Rule, review its Trigger and Actions, and adjust the settings described above before enabling it. Test the result in a safe, temporary context.
Requirements and limits
Move File requires Pro; allow Accessibility, Screen Recording and destination-folder access as requested. The sample moves the capture and uses numbered names on conflicts.