How to Show File Extensions in Windows 10
Step 1: Go to Control Panel.
Step 2: Click on "Appearance and Personalization".
Step 3: Click on "File Explorer Options" or (Folder Options If you are Using Windows 7/8).
Step 4: Click on "View".
Step 5: Uncheck this Option "Hide extensions for Know file types".
Step 6: Click on "Apply" and Ok.
It's done.
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