Just FYI, this is somewhat opposite to the MTH DCS system. MTH DCS stores the primary database in the remote or application. Yes, there are TIU settings stored in the TIU, but mostly big TIU functions dealing with the setting for a given channel and other details. When you transport your remote or app to another location and connect to a different TIU- you still have all your engines and accessories listed - same with the MTH DCS app.
We get this question a lot for people learning at our club and those that have tracks and systems at home.
Lionel=stored in the base.
MTH-=stored in the remote