requirements for uninstallation of the plugin

In requirements for installing and removing plugin there is one point “Upon uninstallation, a plugin should prompt a user that it will be deleting its data and receive a confirmation that the user is okay with deleting the data before doing so and a plugin should also allow the user the option to keep the data upon uninstallation.” We have such option in plugin - to import all data, but should we also do ask and then save data when user wants to delete plugin?