Select your new folder before saving each file.
Notes:
Back at the Prototype webpage, we right click on one of the graphics. We selected SAVE PICTURE or SAVE IMAGE AS to get the Save window.
Be sure to select the new folder in the “Save In” field at the top of the window. Then click on the Save button.
This works that same way to save the webpage. Simply select “SAVE AS”, pick the correct folder and click on SAVE.