navigate to the following folder
%userprofile%\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets

In the folder, you’re going to see a whole bunch of files with long, meaningless file names and no extensions. Some of these are the image files you’re looking for; many are not. Just create a new folder anywhere you like, select all files in the Assets folder (Ctrl+A is the quickest way), and then copy them to the new folder.

When you do this, Windows will warn you that some of the files may be harmful to your computer. This is just because you’re moving them from a system folder and Windows doesn’t recognize the file types (since no extensions are assigned).

In the File Explorer window, with your new folder showing, click File > Open Command Prompt, and then choose “Open command prompt as administrator” to open the Command Prompt at your current location.

At the Command Prompt, type (or copy and paste) the following command and hit Enter:

ren . *.jpg