The work you do in DRAW is stored in a database. It is recommended to back it up however, e.g. to store your apps in git or in any version control system. This is done by using the Olympe DRAW Snapshooter, which comes with the installation of CODE.
Once CODE is installed and you have set up your first project, simply run the following from the folder from which you ran yeoman:
This will dump your DRAW project to your local drive in your project