With the default settings in Office 2013, clicking the save button on a new document takes you to the File >> Save As menu. Also, in most Office 2013 applications the Save and Save As button are exactly the same when working with a new document. You might never even notice this happens unless you are someone who starts a lot of your own documents. And if you are, this “feature” can get annoying, so here is how to disable it.
Open any Office 2013 app that you want to change the settings in (Word, PowerPoint, Excel, Publisher, etc.). Then click the File tab.
From the File menu click the Options button.
In Options, click the Save tab and then in the right pane check the box labeled Don’t Show the Backstage When Opening or Saving Files.
Click OK to exit and save changes.
Now when you click the Save button while working on a new document, presentation or spreadsheet, it will open the traditional Save As menu from Windows Explorer.