I think you might be right, although it would be nice to have an official confirmation.
Following a session using my Prime Go I just synced some additional tracks from Engine to my device without first syncing from device to Engine. I noticed that now the option to sync from device to Engine is not available.
@PK, yes, that was my line of thinking as well, but it looks like it doesn’t work like that.
In terms of the direction, I think i’ll sync from device to Engine first from now on.
But…
How does Engine handle conflicts where metadata has changed on both sides?