Incoming and install City Navigator Russia 2015.40. With this card, the additional file folders-ASR, JCV, MD2, SID SQlite.The question is whether to install them into your nüvi? Do I need to remove what was in these folders nüvi and replaced with new ones or add files in these folders? And one more question please, where to find information on the file system GARMIN 3597LMT, which folder which files for some action in the navigator responsible? I want to find out and understand really like the navigator Garmin, and literature for more in-depth study can not tell who nayti.Mozhet or give the link.