Navigate with the Windows Explorer to the directory/ file which contains your confidential data.
Right click on the directory/ file and choose properties from the menu.
Select the Security tab and click on the button Advanced.
Select the Auditing tab and click on the button Edit.
Click on the button Add.
Type everyone and click on Check Names after that click on OK
Mark both the columns Successful and Failed in the following lines:
- List folder / read data
- Create files / write data
- Delete subfolders and files
Click on OK.
Click on Apply. If there are a lot of files this may take some time.
After the Apply is finished click on OK in this window and in all the previous windows.