Use Save As to save your workbook for the first time or to save a copy of your workbook in the location and file format you want.
Cleanup cells in your workbook - Microsoft Support
How to Protect a Microsoft Excel File with a Password
Excel XP: Create, Open, and Save Workbooks
Create a new workbook - Microsoft Support
Saving an Excel Workbook: File Formats & Options - Video & Lesson Transcript
Save a copy of a workbook to your computer - Microsoft Support
Embed your Excel workbook on your web page or blog from SharePoint or OneDrive for Business - Microsoft Support
Save an Excel workbook for compatibility with earlier versions of Excel - Microsoft Support
Save your workbook - Microsoft Support
Restrict access to workbooks with Information Rights Management in Excel - Microsoft Support
Share and collaborate with Excel for Windows - Microsoft Support
Print a worksheet or workbook - Microsoft Support
Unable to open certain Excel spreadsheets stored in Sharepoint with - Microsoft Community