@srk: the appdata folder is hidden by default. That's why the anki manual to which I linked tells you how to view this folder:
On Windows, the latest Anki versions store your Anki files in your appdata folder. You can access it by opening the file manager, and typing %APPDATA%\Anki2 in the location field. Older versions of Anki stored your Anki files in a folder called Anki in your Documents folder.