Garmin Nuvi GPS Folders and Files Structure

October 31, 2010 by PetuaTerbaik
Filed under: GPS, Garmin 

Are you confuse about the files and folder structure in Garmin Nuvi GPS device ?

Here you can know the folder and file structure of the Garmin Nuvi device.

  • Diag folder – used by Garmin
  • ExtData folder – used by Garmin
  • GPX folder – stores your trip log and YOUR FAVOURITE saved location (the loves icon). You can open the GPX files within this folder with Mapsource.
  • Help folder – stores help files in different languages
  • JCV folder – stores Junction View files on models which support such feature
  • JPEG folder – stores Nuvi’s default pictures and splash screens. You can add more jpg files into this folder
  • POI folder – stores custom POI and travel guide files. These files are with .GPI extensions. It is ok to delete these files if you are sure you don’t want them
  • RemoteSW folder – used by Garmin
  • scrn folder – stores your screen capture images. The files are in bitmap (BMP) format and could be opened with Window’s Paint application
  • Text folder – stores default and custom messages and keyboard layouts. These are text files with .GTT extensions. You can edit them with a text editor. More info
  • Vehicle folder – stores Garmin vehicle icons. Files are with .SRF extension. You can add and delete these files. More info
  • Voice folder – stores Garmin voice guidance files. Files are with .VPM extension. You can delete unused voice files but do so with care. More info
  • GarminDevice.xml – stores information about your Nuvi to facilitate tranfer of data to/from your Nuvi. Leave this file alone.
  • gmapbmap.img – Garmin base map (worldwide map)
  • gmapprom.img – Garmin pre-programmed (preloaded) map. Back up this file before deleting or overwriting it.
  • gmapprom1.img – Garmin pre-programmed (preloaded) map. Back up this file before deleting or overwriting it.
  • gmapsupp.img – This is the common file name for Garmin maps including those from MFM.
  • gmapsupp.unl – Unlock code file for Garmin supplementary map.
  • gmaptz.img – Garmin time zone map. Leave this file alone.
  • GUPDATE.GCD – Used for Garmin firmware update. Leave this file alone.
  • Locales.xml – stores default language, currency sign, time zone, etc settings for different countries. Leave this file alone.

source :

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