Hi Paul,
concerning the organisation of variables in autoobjects: You can create several classes each containing a set of dedicated values - or you can create one huge settings class, containing all settings of your UI application. This depends completely on your application and your software design.
Concerning the persistence: There is no automatism for storing data within a filesystem or a EEPROM - this is something that you should provide within your underlying middleware or device drivers. Please consider, that this is something completely application / target specific and not related directly to the UI application.
I hope this answers your question.
Best regards,
Manfred.