vanilla_thrilla_2first get your file extensions visible so we can help you better:
To make sure your file extensions are visible, open Windows Explorer or any folder window and choose View, Folder Options or Tools, Folder Options (depending on your version). Click the View tab, make sure the option to 'Hide extensions for known file types' is unchecked (the exact wording will vary depending on your version of Windows), and click OK. Now extensions will be visible for nearly every file on your desktop and in your Explorer and folder windows.
Credits to thakkar k.(Too lazy to write my own)
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