Stories are saved in the local storage of a web browser. This is isolated between a browser and its use of incognito or private windows. Clearing sessions and cookies in a browser may also clear the storage of Twine 2. Using a different browser also means accessing different local storage.
When used as a desktop application, Twine 2 stores its files under the current user's files. The current collection of Stories can be accessed through the View -> Show Story Library menu option.
As a desktop application, it stores its files in either HTML or as Twee source code on the local computer. It can import and export both HTML and Twee source code (