You can save a file to a location on your computer, like a hard disk drive or a flash drive, or on an online service, like OneDrive. You can also export files to different file formats and save them to different file names.
Important: Even if you have AutoRecover enabled, you should save a file frequently while you are working on it to avoid losing data due to an unexpected power failure or some other problem. AutoRecover is described later in the topic “Save AutoRecover information automatically.”
Save a file
By default, Office saves a file in a default working folder.
- On the File menu, click Save, or press + S.
Tip: Alternatively, you can click the Save icon in the upper left corner of the window.
- If you are saving the document for the first time, you must enter a file name.
For more information click this link: Save a File in Office for Mac