Files with the .SNT extension contain note data created in the Windows Vista, Windows 7, and later Windows, native Sticky Notes version. They store one or more notes, including text, font, color, and position on the desktop for each note, and allow you to save your notes even if you log out of your account.

There is no compatibility of the format for saving notes between the Windows systems. You can open the application by typing "stukynot" in the command line. By default, SNT files are not related to the application, but the extension can be assigned to it after selecting the "Run with ..." option from the file’s context menu and selecting the Sticky Notes application in the directory of system applications, selecting the option to always use the application to run them. The note files are by default saved in the C:Users[username]AppDataRoamingMicrosoftSticky Notes catalog.