If you would like to make sure that your Excel spreadsheet data is secure this guide will show you how to password protect and hide worksheets ...

With the Excel file open select File in the top-left corner of the screen, followed by Info. Select Protect Workbook, then choose Encrypt with Password.

Open the Excel file you want to protect with a password. Click on File -> Info. Now select Protect Workbook. Select Encrypt with Password from the list. Now enter the password. Confirm it once ...

Once the final version of your Excel workbook or Microsoft 365’s version of Excel Workbook is complete you might want to stop or turn off the workbook sharing in Excel to avert any unwanted changes.