Where did Windows 10 save clipped images using Windows Key + Shift + S?
Solution 1:
The new Snip & Sketch tool copies to the clipboard but will also save the image in a temp file. The temp file of the image is stored in AppData\Local.
C:\Users\%USERNAME%\AppData\Local\Packages\Microsoft.Windows.ShellExperienceHost_(a string of numbers and letters)\TempState\ScreenClip
Source: https://www.reddit.com/r/Windows10/comments/aia21t/snip_sketch/elt5ajt/
Solution 2:
It looks like the location of temp files changed again :
C:\Users\your.profile\AppData\Local\Packages\MicrosoftWindows.Client.CBS_(numbers and letters)\TempState\ScreenClip