something about host game option

[wiiliam]

In Steam, when you select the option of host game, you can “duplicate” the files you already made.

I don’t see any options about it in NS, why?(Maybe I too stupid to find it,maybe someone tell me about it)

NS platform has some agreements about it, or just the game doesn’t update something like that?

I want these option because In NS, I have many files crashed in DS single player, I afraid it would repeat in DST.