See How Easily You Can show or hide file extensions in windows
December 1st, 2007 Priyanka Share PDF Download
Cant see the file extension of your document?
Wandering if it is htm or html?
So you need to show your file extention -
Just go to My computer -> tools -> folder -> options -> views and de-select “hide extensions for known file types“.
(To view sample, click thumbnail on left)
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