Step 1 - Click on Link Button - looks like an chain link
Up Pops a Window with 3 tabs (see Step 2)
How to upload any type of file, image, movie, powerpoint, pdf, etc.
From ANY existing page, or create a new page, do the below (where Steps 6 to 8 are OPTIONAL). Instead, just close the Edit page, or click on any link to leave the Edit page (this cancels the Edit/Add Page).
A 'new' page does NOT have to be saved for the file to be used, in any way.
Once the file is uploaded on the web server, it is there, and is hard to delete.