The folder (directory) has '-files' attached to the 'same name' of the HTML file. the HTML file is saved at the same level as the folder i.e. it is NOT inside the folder. you can move it there, but then it won't find any of the graphics, CSS files, etc. To then get the HTML page to work as per the original, you need to edit it to strip out all references to the folder name.
Also, if you don't also remove any Javascript or some external URL references, you are likely to get 'run time errors' from MSIE.