Every computer file has its name and its extension:
mypicture.jpg
If the file is an image, the usual format is jpeg and the extension name is .jpg
"mypicture" is the FILE NAME.
The file can not display the image unless the right extension
is written or copied again after renaming the file; same is true with movie files. Renaming
a videoke file I have downloaded, the file plays successfully after downloading
after I have renamed it there comes the problem, it would not open again the
way it has played before.
