Saving a Workbook
It is good practice to save your workbook as soon as you can, and then to regularly save it to protect against data loss.
To save your document click Save under the File menu or press Ctrl + S. If you are saving the workbook for the first time, the Save As dialogue box will appear.
Select a location to save the workbook in and an appropriate name, which will make recognising this workbook easy in the future, and click Save.
The Title Bar now displays the name of the workbook.
From now on whenever you save the workbook, Excel will just update the workbook previously saved.
If you need to save the workbook to a different location or under a different name, click Save As from the File menu and follow the procedure as before. This will create another copy of the workbook.