Hi, I've got what feels like a stupid question about using Sync. I've got 2 harddrives on 2 pc's with mostly the same stuff on them but on each there are a few different things that I've downloaded separately. I want to sync them so they both have everything on them that the other has. i.e. I want to add anything from Drive A that isn't on Drive B and visa versa. But will Sync work that way or if there is something on one drive that's not on another will it be deleted?