Thread: Help updating Nuvi 265W maps

US/EU 2x5/W series doesn't use SID file, 3D img file or JCV file. Some Asian devices of that series can use JCV however. If you have a Western 265W model all you need worry about is the detail map update. You can use an already compiled img (easiest way) or make one yourself to your needs from a gmap folder/PC version installed on your computer using MapInstal.

Thank you, question: is the IMG file the same as IMGUn?