OOONA is a cloud-based platform.
To set a time interval for the automatic backup, go to Settings ->User Configuration->General > User Configuration > General Tab.
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Manual Save
You can click on click on Project ->Save> Save in the menu or the Save button on the toolbar.
You can also use the save Save hotkey. The default value is "Ctrl+S". You can check what hotkey is associated with the "Save current project" action in the hotkeys dialog window. If you have a poor internet connection, make sure to backup your project locally. To download a project to your computer, click Project ->Download > Download project.