Once you have created your file folders, you can save (file away) any of your work or works that you find. Manipulating your work into a folder is easy.
While you are in a window of the work you would like to save:
select "file" for the standard tool bar
click on "save as"
select the "drop-down" arrow of the 'Save In' window
locate and click on your folder to wish save your work in
you may rename your file in the "Name File" window at the bottom