I have realized an App (actually as a Chrome Extension, but it will become a WebApp using Ionic), where data is stored on LocalStorage, using chrome.localStorage.sync object.

Now the App works fine, but I would the App saves the Json Object in a Google Account Space (I think Google Drive or whatever). I don’t want data remains on LocalStorage, I would to use a space as private and personal for the customer will use my App.
Actually, I don’t know where typical other Web App or Web Based App for Mobile with access through Google Account saves user data.

Someone can enlight me on this mysterious?

Thanks.