Windows hides common file extensions by default, and periods are valid in file names.
(folder settings -> view -> 'hide extensions for known file types')
When file extensions are hidden, anything you type in a file name, including periods, becomes the file name, and the extension is added on to it at the end.
Windows hides common file extensions by default, and periods are valid in file names.
(folder settings -> view -> 'hide extensions for known file types')
When file extensions are hidden, anything you type in a file name, including periods, becomes the file name, and the extension is added on to it at the end.
Example:
File extensions hidden:
Idiocracy.2006
Not hidden
Idiocracy.2006.mp4