Hi @marshalleq,
I’ve done some digging, this topic was originally called
… Remote playback over internet …
and later expanded to
Roon mobile: remote playback outside of the home [On Roadmap - Scheduled]
I believe this was done as Roon’s vision is wider that just play back over the internet.
Using this broader description, you opening post / topic was consider to fail under this definition and hence the merge.
I believe this is the start of your “opening topic” (that is now in this topic) …
Careful reading of it, I see your focus is on syncing music files to portable devices rather than streaming to them via a data connection, which is the main thrust of discussion in this topic.
I see what you mean about the dates 
Discourse is not our friend here.
Let me see what I can do, to separate the two requirements … it will be a challenge and take a while but I will try.
Note I may have to “stage” posts to do this so don’t be alarmed if they are not visible for while.
Update …
Link to the reconstituted topic, I’ve adjusted the title to make it clear the request is for Syncing not Streaming.