Enabling Windows File Extensions
By default, Windows disables the function to allow users to see known file extensions. Unfortunately, this can cause issues for many users trying to pinpoint specific files.
Open “File Explorer Options”
Start by searching for “File Explorer Options” in the Windows Start Menu:
This options menu allows you to modify the settings of Windows “File Explorer”.
Make File Extensions Visable
Once the options menu opens, you will see three tabs at the top.
Click on the “View” tab:
Then, untick the checkbox next to “Hide extensions for known file types.”
Lastly, click the “OK” button in the bottom right corner of the options menu to save your changes.