Isabel Berney needs to know where Windows stores the Sticky Notes she creates, so she can make sure they're backed up.
Microsoft added Sticky Notes with Vista, and changed them entirely with Windows 7. In Vista, you can write longhand sticky notes with a mouse or pointer, or record them with a microphone, but you can't actually type them with a keyboard. Windows 7 does it the other way around.
But both versions save the notes in a file called StickyNotes.snt, located in the C:\Users\login\AppData\Roaming\Microsoft\Sticky Notes folder. (When I write login, I mean the name you use to log into Windows.) You can easily get to C:\Users\login\AppData\Roaming by selecting Start, typing %appdata%, and pressing ENTER.
So if you make a lot of notes, you should make sure that your backup routine includes that folder. In fact, it's a good idea to backup the entire AppData folder.