Save As
Choosing Save As saves the current Metro document file to disk and gives you an opportunity to name or rename the document or
save it to a different drive. If you save a file under a different name, the
original version will remain intact.
After using Save As, the current Metro document becomes the Saved As document, which now has the
name that you typed into the Save As dialog box.
Save A Copy As
The "save as copy" menu item works exactly like "save as" except it does not set the default filename and does not add the copy to the open recent files menu. So subsequent Saves will save as the original file name and not the copy.
See Also:
Save
Save As Portable Bundle