Files
& Folders
- Garmin GPSMAP 66 common file and folder
structure reference.
- microSD memory cards must be formatted FAT32 (not
exFAT).
File
Limitations
2,000 GPX files
10,000 waypoints
Unlimited geocaches
300 activities
250 courses
250 routes
250 saved tracks
2,000 archived tracks*
20,000 points per track
1,000 JPG photos
100 custom map tiles
250 BirdsEye Imagery files
15,000 mapping segments
Each GPX file can contain a mixture of waypoints,
geocaches, routes and tracks.
If the GPX file containing a waypoint or geocache is deleted, the waypoint will
no longer be available on the device.
When utilizing routes, only 50 points can be used for on road navigation, or 250
points for direct navigation.
*Archived tracks do not count against GPX file limit; 1 archive track per gpx
file.
Common Files
BIN
EPO.BIN -
Extended Prediction Orbit (EPO)
data file
OUT.BIN - Wi-Fi network settings
FIT
{name}_course.fit - Course saved on the device
Device.fit - Device configuration file
Settings.fit - Fitness configuration settings
YYYY-MM-DD HH.MM.SS.fit - Recorded activity file named by start
date and time
GCD
GUPDATE.GCD - Device firmware update (full)
GGZ
geocache.ggz - Geocache GPX Zip database files
containing detailed geocache information
GPC
{name}_course.gpc - Garmin Point Cache for identically named
course
YYYY-MM-DD
HH.MM.SS.fit - Garmin Point Cache for identically named
activity
GPF
{name}.gpf -
Garmin profile configuration file
GPI
{name}.gpi
-
Garmin POI database file
GPX
additional_waypoints.gpx -
Child waypoints for geocaches loaded via
GCLive
Chirp.gpx -
Most recent information received from a Garmin chirp beacon
Coordinates.gpx -
Recent "Where To?" Navigation Destination
Current.gpx -
Active Track Log Recording
GCxxxx.gpx -
Geocache
MOB.gpx -
Coordinates saved from Man Overboard application
.Position.gpx -
Last known position
Route_{date time}.gpx -
Route created and saved on the GPSr
Saved.gpx -
Contains Area Calculation track data
SightNGo.gpx -
Last destination created with Sight 'N Go application
Send_File.gpx -
Most recent geocache shared wirelessly not from GGZ file
Send_GGZ.gpx -
Most recent geocache shared wirelessly from GGZ file
temp.gpx -
Waypoints sent to the device from MapSource or BaseCamp
{date time}.gpx - Track created and saved on the GPSr
Track_{date time}.gpx -
Track created and saved on the GPSr
Waypoints.gpx -
Waypoints transferred from Garmin computer application
Waypoints_{date}.gpx -
Waypoints created on the GPSr
{date time} Auto.gpx -
Track log archive when [Setup > Recording >
Advanced Setup > GPX Auto Archive > When
Full]
{date time} Day.gpx -
Track log archive when [Setup > Recording > Advanced Setup > GPX Auto Archive >
Daily]
{date time} Week.gpx -
Track log archive when [Setup > Recording > Advanced Setup > GPX Auto Archive >
Weekly]
{date time} Stopwatch.gpx -
Tracklog created from Stopwatch page while Stopwatch Activity Sync is
enabled
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.gpx -
Garmin Adventure data
IMG
{dxxxxyyza}.img -
Garmin Vector Map
gmapdem.img
-
Digital Elevation Model
map included with your GPSMAP 66
gmapbmap.img -
Basemap included with your GPSMAP 66
Tip: Do not delete or modify this file!
gmapprom.img -
Primary Garmin map
installed to your GPSMAP 66
gmapsupp.img - Supplemental map sent to your GPSMAP 66
via Map Installer application
gmaptz.img -
Garmin Time Zones Map
Tip: Do not delete or modify this file!
{map name}.gma -
Garmin Map Authentication certificate (required for all maps with FID > 2199)
{map name}.sum -
Garmin map update checksum (used to verify error free map updates)
{map name}.unl -
Garmin map unlock code (required to use locked maps)
JNX
{name}.JNX
-
Garmin
Raster Map (Satellite Imagery - BirdsEye/BirdsEye Direct)
KMZ
{name}.KMZ
-
Garmin
Raster Map (User
Created)
TXT
geocache_visits.txt -
User logged geocache visits
Tip: Do not edit this file!
startup.txt -
Customizable startup message
XML
Adventure_Logs.xml -
User logged Adventure ratings
Tip: Do not edit this file!
GarminDevice.xml -
Device configuration manifest
geocache_logs.xml -
User logged geocache visits
Tip: Do not edit this file!
index.xml
-
Weather application data
system.xml -
Basic system information and error reports
GPSr Directory
Parent Directory \ Active Directory \
Files \
Content Description (file types)
GPSMAP 66 \
Garmin \ GarminDevice.xml
\ Primary system files and vector maps
folder (*.GCD *.ico *.img *.sum *.txt *.ver *.xml)
GPSMAP 66 \ Garmin \ Activities \
Garmin Activity Logs (*.fit)
GPSMAP 66 \ Garmin \ Adventures \
Garmin Adventures Database (*.adv)
GPSMAP 66 \ Garmin \ Apps \
Garmin IQ Application Files (*.BIN *.PRG)
GPSMAP 66 \ Garmin \ BirdsEye \
Garmin BirdsEye high-resolution raster map imagery (*.jnx)
GPSMAP 66 \ Garmin \ Courses \
User created courses (*.fit)
GPSMAP 66 \ Garmin \ CustomMaps \
User created raster maps (*.kmz)
GPSMAP 66 \ Garmin \ CustomSymbols \
Contains custom waypoint symbols (*.bmp)
GPSMAP 66 \ Garmin \ EDM \
Garmin Explore database files (*.bin)
GPSMAP 66 \ Garmin \ ExtData \
Extended Data files (*.bin)
GPSMAP 66 \ Garmin \ Filters \
Folder system for saved filters
GPSMAP 66 \ Garmin \ Filters \ Geocache \
Contains filters used when searching geocaches (*.gff)
GPSMAP 66 \ Garmin \ GGZ \
geocache.ggz \ All (*.ggz)
files are stored in this directory and sub-directories
GPSMAP 66 \ Garmin
\ GPS \ WebUpdater program configuration
files (*.BIN *.nvm)
GPSMAP 66 \ Garmin \ GPX \
temp.gpx \ All (*.gpx)
files are stored in this directory and sub-directories
GPSMAP 66 \ Garmin \ GPX \ Archive \
Saved.gpx \ Contains saved tracks and
waypoints (*.gpx)
GPSMAP 66 \ Garmin \ GPX \ Archive \ Auto \ Auto-archived track recordings (Day, Week, Full) (*.gpx)
GPSMAP 66 \ Garmin \ GPX \ Current \
Current.gpx \
Current track recording (*.gpx)
GPSMAP 66 \ Garmin \ GPX \ Nav \
Chirp.gpx, Coordinates.gpx, SightNGo.gpx \
Recent Navigation Destinations (*.gpx)
GPSMAP 66 \ Garmin \ GPX \ Temp \
Send_File.gpx, Send_File.ggz \
Recent Share Wirelessly file (*.ggz *.gpx)
GPSMAP 66 \ Garmin \ JPEG \
Photos and images (*.jpg)
GPSMAP 66 \ Garmin \ NewFiles \
unknown (*.???)
GPSMAP 66 \ Garmin \ POI \
Points of Interest database files (*.gpi)
GPSMAP 66 \ Garmin \ PointCache \
Garmin Point Cache files for saved activities and courses (*.gpc)
GPSMAP 66 \ Garmin \ Profiles \
Hike.gpf \
Profile (Activity) configuration files (*.gpf)
{original}
GPSMAP 66 \ Garmin \ RemoteSW \
Update files other than device firmware
(*.gcd)
GPSMAP 66 \ Garmin \ RINEX \
grmnxxxyyy.18O \
RINEX log files
(*.18O)
GPSMAP 66 \ Garmin \ scrn \
Screen capture image storage (*.bmp)
GPSMAP 66 \ Garmin \ Settings \
Settings.fit \
Fitness settings (*.fit)
GPSMAP 66 \ Garmin \ Shortcuts \
Shortcut configuration files (*.gsf)
GPSMAP 66 \ Garmin \ Sports \
RunningRunning.fit \
Fitness settings
(*.fit)
GPSMAP 66 \ Garmin \ SQL \
CustomMaps.db \
Database index files (*.db *.sqlite3)
GPSMAP 66 \ Garmin \ Text \
Language database files (*.gtt)
{original}
GPSMAP 66 \ Garmin \ Vehicle \
Vehicles.ver \ Position icon files (*.srf
*.ver)
{original}
GPSMAP 66 \ Garmin \ Weather \
index.xml \
Weather application data (*.json
*.png *.xml)
GPSMAP 66 \ Garmin \ WIFI \
OUT.BIN \
Wi-Fi network settings (*.bin)
microSD Directory
Parent Directory \ Active Directory \
Files \
Content Description (file types)
microSD \ Garmin \
Secondary vector maps folder (*.img)
microSD \ Garmin \ BirdsEye \
Garmin BirdsEye high-resolution raster map imagery (*.jnx)
microSD \ Garmin \ CustomMaps \
User created raster maps (*.kmz)
microSD \ Garmin \ GGZ \
geocache.ggz \ All (*.ggz)
files are stored in this directory and sub-directories
microSD \ Garmin \ GPX \
All (*.gpx)
files are stored in this directory and user created sub-directories
microSD \ Garmin \ JPEG \
Photos and images (*.jpg)
microSD \ Garmin \ POI \
Points of Interest database files (*.gpi)
microSD \ Garmin \ SQL \
CustomMaps.db \
Database index files (*.db *.sqlite3)