Frequently asked questions


Before looking into any frequently asked questions, do ask yourself this question.
Did you actually read the manual ???

Over time the manual got updated after new Firmware options came available.
So make sure you have the last one.
You can Read The **Fine** Manual by clicking on this link ;-)
(you can even take the manual with you in your zumo: See tips & tricks page )

Hardware related

[Q] Is there a better security screw for my Zumo?
[A] Yes. The standard screw + "security" screwdriver can be a pain. The little screw can lock itself (of course when you do not have the screwdriver with you) and is very small. Dutch hobbyist Marco Boelis has made a replacement thumbscrew. Details can be found on in this thread
Another hobbyist; Farzad has made even another improvement over the security screw: The very simple but effective Security Lever (details in provided in the link)

[Q] The rubber cover that protects the contacts is cracked / broken. Now what?
[A] In the first release years the rubber is not of too good quality and will break in time. Garmin replaces these rubbers as a guarantee issue. In the beginning they even replaced entire motor mounts because of this.

[Q] Why is the zumo so quiet? (applys to MP3 & bluetooth as well)
[A] Use the bottom hard key to adjust the master volume. Once you tap this key you should see yellow bars overlaid on the zumo screen. Now use the + and - hard keys to adjust the volume.

[Q] So what does the volume icon under the wrench do?
[A] It acts as a mixer. The percentages displayed there are percentages of the main volume that is set by the hard keys. This allows you to increase the volume of the MP3's relative to the navigation voices.

Firmware / software related

[Q] How do I make a BACKUP of all the files?
[A] Just plug the USB cable into your PC and in the port beneath the bottom cover of the Zumo and in a few seconds, the unit will enter ‘Mass Storage Mode’. The PC will now see the contents as a new drive. Open the new drive labeled ‘Garmin’ and there you will find a folder named ‘Garmin’ –
Just right click the folder, select "Copy". Now go you to ‘My Documents’ (or wherever you wish to store it) on your computer, and create a file named "backup". In that folder, selecte "Paste".

The entire backup, including all maps will take at least one hour.

Important: Make sure you backup all your Zumo files, after each Firmware update! Otherwise a restore with an old backup file can cause files like voices not to be recognised.

[Q] I accidentaly deleted my maps / files / folders !! Help!
[A] First go to you own backup files on your PC, then simply replace the missing files. If you do not have a backup; Look at the sceme below so you can manualy restore some of the folder structure.
Your detailed City Navigator maps can be restored with Mapsource by selecting all maps (or part of it, depending on your Zumo model). The file new created mapfile will be called gmapsupp.img . Rename that file into GMAPPROM.img and you got the most important file back.
The BASEMAP can be downloaded over here (small 6Mb basemap, USA version)

[Q] My new Zumo is charged and ready to go. What do I do first?
[A] Update the unit with the WEBUPDATER. Then BACK-UP the file system on the Zumo and then if you mess something up you can easily restore the files… (remember that deleting anything from the Zumo is permanent)

[ Q ] How can I tell what software version my Zumo is on?
[ A ] Select: Wrench / System / About . On top it reads the software version

[ Q ] Do I allways need to update the Zumo???
[ A ] Yes, generally speaking, because there are new functions added and older bugs are resolved. You can update the Zumo by using the Webupdater. But before you do, please check out the Bugs & issues list to read about known or suspected issues. You can find all the Zumo's release notes over here

[Q] Why won't my CD install on my computer.
[A] The disc supplied with your Zumo kit is a DVD, not a CD.

[Q] What are all these filenames in the Zumo, what do they mean?
[A] See picture below. If you connect your Zũmo with USB, your computer will see it as a drive letter (like K:/Garmin).

[Q] Do I need to delete files to increase memory on my Zumo?
[A] Before you do ANYTHING it is advised to make a full back up of all the files to your hard drive (see tips & tricks )

The general answer is "No" you do not need to delete files to increase memory. However, you can delete the demonstration mp3 files as well as any unwanted TTS Voice and text files, such as languages you will not use. This way you can free up a lot of space.
If you are using a Macintosh command-delete (or dragging it there) puts it in your trash can, so you still have to empty the trash.
Unlike the PC where deleting files on an external drive is permanent and does not go to you trash can!

Files that are SAFE to delete AND that free up a lot of space are marked in GREEN.
Files to keep away from in RED

Description of files and folders:

Picture of the Zumo's file structure:


File / folder name
Can you delete it's content?
Current.gpx = file created each time you connect your Zumo to USB. Stores all current loaded routes and waypoints in the Zumo. This file is send from the Zumo TO mapsource
Temp.gpx = file created that stores all routes and waypoints for connection from mapsource TO Zumo
But only the archive will clear up useful space.

Tip: When saving the Archive files on your hard disc, leave the one with the highest number, and save the rest.
File numbering is then continued
This prevents overwriting existing files on your HD.
Folder where pictures are stored
Folder for Points of Interest: All data loaded with POI loader like speedcams etc.. Multiple filenames with .gpi extentions can be created.

poi.gpi = all poi's that are loaded with POILOADER
yourname.gpi = manualy created and manualy added poi files with your own selection (like poi's that do not change often like hotels)
Cyclops.gpi = trial version of Garmins speedcams subscription.
Folder where Bluetooth / TMC firmware updates are stored
Filenames example: 006C008800.GCD and ....bin and ..... sum
Screenshots pictures are stored here.
Filenames: 2776.JPG (example. The numbering seems to be random)
Additional language versions, text files.
YourLanguage.gtt. = major translation file
YourLanguage.Gdnc.gtt = additional translation tags (official)
YourLanguage.Trf.gtt = Traffic info translations
YourLanguage_User.gtt = home made translations that add to or overwrites
the the major file (see tips & tricks)

If American English is selected, no major translation file is necesary since this language is embedded in the units firmware.
Just keep your own language file!!
Deleting textfiles save up a lot of space
Missing files can be restored with the Webupdater
Technical file
Additional vehicles you can download as position cursor.
Link to Garmin Garage
Filenames =
Additional language versions, voice files.
Filenames like:
Afrikaans_.vmp are normal voices that do not speak streetnames
Filenames like:
Nederlands_Claire.vmp are TTS (text-to-speach) voices that do speak streetnames.. Note the "name" like John, Claire, etc..
Just keep your own language file (TTS and/or normal version)
Firmware Update file
BASE MAP: Crude map with Major roads only covering a (large part) of the world
Unless you replace it with the world Routable Basemap (see Modifications).
Or you delete a USA basemap while you are in the EU (or vice versa)
PRE-PROGRAMMED MAP: Most important mapsection, since this large file contains your detailed pre-loaded region.
Supplemental maps: All maps you add to the pre-loaded maps, like other regions or Topo maps are stored in this file
Additional mapfile found in branded zumo's like Honda & BMW. Contains waypoints of dealers etc.
Updates / restores only over the branded dealer network
unimportant help file
unimportant help file
Technical file
Technical file
Music file. All music must be in the *.mp3 format. No other music formats are supported
The Audiobook folder
Activation.dat = licence code for audiobook subscriptions
*.aa = audiobook file format

[Q] Can I modify or customise the data fields in the Zumo?
[A] No, you can not (unfortunately). Where on units like the Streetpilot, 278 and quest you can select what data you want in your screen, info like MPH or time fields can not be changed in the Zumo. This feature came high in the "wishlist" poll.

[Q] Can I turn off the low fuel warning symbol?
[A] Yes: tab: speed / reset / arrow down / Miles (or KM) per gallon and set it to zero

SD card related

[Q] Do I need an SD card?
[A] No! You can operate all basic navigation functions without the SD card.

[Q] What is the SD card for?
  • Primarily for storing additional data like MP3's, audio books and additional maps (segments or topo maps). It serves as additional storage space.
  • Secondarily for sharing routes with other Zũmo owners while on a ride.
  • You can also use it to transfer routes or tracks that are made or saved in the .GPX format. Note: This is not the normal way to transfer routes. See "Navigation & creating routes"

[Q] Does the Zumo support SDHC cards?
[A] Yes, starting from firmware version 3.00

[Q] What is the maximum size SD card that I can use in the zumo?
[A] As of version 3.00 software, the official support is up to 4Gb. But SDHC cards of 8GB cards are no problem, 16GB cards have been reported to be in good use as well.

Mapsource & the Zumo

[Q] Is Mapsource and City Navigator the same thing?
[A] No, they are two different parts of the mapping system. Mapsource is the underlying software that operates the maps. City Navigator is the map.

[Q] Do I need to send the maps to the Zumo?
[A] If you have the Zumo 550 you don’t need to transfer the maps as they are pre-installed on the unit. If you have the Zumo 450 or 500 your Zumo would have come with maps for your region pre-installed and you would only need to upload maps if you require regions that were outside of the pre-installed area. The Zumo 400 is pre-installed with your local region but comes with no additional mapping DVD so that option would not be available.

[Q] If the maps are already installed what do I need the DVD for?
[A] You don’t actually need the DVD unless you need to add additional maps that are not pre-installed as the Zumo will work fine without it but the DVD allows you to install both Mapsource and City Navigator on to your PC which will allow you to plan routes on the PC and then transfer them to the Zumo.

[Q] How do I know if I have the latest update of Mapsource installed?
[A] Open Mapsource and Click Help/About Mapsource – the installed version will be shown. The 'Check for Software Updates' function in the Help menu has been reported not to work. It is better to download Mapsource updates directly from

[Q] I keep seeing references to City Navigator V8, V9, V10, 2008, 2009 etc. What’s that all about?
[A] Until the 2008 versions were introduced, City Navigator was referred to by its version number (this varies from country to country) but for the 2008 year Garmin changed the way it lists the maps thus what is V10 of the European maps is actually called 2008 and NOT V10 but some still refer to it in the old way. Later on they added "NT" (read next)

[Q] What is the difference between City Navigator and City Navigator NT?
[A] NT denotes ‘New Technology’ and uses a different type of compression for the maps to reduce file sizes. The Zumo is shipped with the NT version but can also use the earlier, non NT maps. NT maps will not work with units prior to the Zumo.

[Q] I’ve just purchased the latest version of City Navigator NT. Can I use it on a second GPS unit?
[A] No, as of the City Navigator 2008 editions, Garmin will only license the maps for use on one unit. If you wish to install the maps to another GPS you will need to buy an additional license.

[Q] I need to buy some additional maps. Should I buy them on DVD or SD card?
[A] Neither option is perfect and what is best for you will depend on your intended use. The DVD maps have the advantage that they can also be installed on to your PC for route planning but have the disadvantage of not being transferable to a different GPS unit. The SD card maps have the advantage that the card can be used in any Garmin that accepts SD cards but the disadvantage is that they cannot be installed on to a PC.

[Q] I'm getting an error when I attempt to send a route from MapSource to the Zumo. ("Some devices have been located, but the device you specified cannot be recognized. Set the interface options of the GPS to 'Garmin' or 'Host'.")
[A] Update your MapSource version to the latest version. or

[Q] Where can I find a free (topographic) maps to download to my Zumo
[A] The ultimate collection of free (or paid but hard to find) maps can be found in this topic on

[Q] Does the Zumo support custom waypoint symbols from Mapsource?
[A] No.

POI & waypoints

[Q] Where can I find Points of Interest (POIs)?
[A] There are several general websites such as:
There are also websites with specialized listings such as motorcycle dealers:
In addition, try and search for "gps poi"

[Q] How do I get these POI's on my Zumo?
[A] You use the POI loader program that came with your Zumo (on the DVD), or you can download it over here

[Q] How many POI's can my Zumo handle?
[A] Pretty much! If not infinite. Up to 25.000 POI's loaded have been reported by users.

[Q] How do I organize and load Custom POIs?

Navigation & creating routes

[Q] Why can I only transfer 1 route to the zumo at a time?
  • MapSource overwrites the file temp.gpx on the zumo's drive every time you click the "Send To Device" button. Therefore, when you disconnect the zumo from the computer and restart, you will only see the last route sent.
  • To correct, open a new instance of MapSource and copy and paste all of your routes and waypoints into this new file. Then click "Send To Device" in this instance.

[Q] Can I use the SD card to transfer routes?
Yes, but it is not the standard procedure: All routes, tracks and waypoints create in Mapsource are normally stored in the .GDB format. Normal procedure is to use Mapsource "send to device" (see description above) and routes get stored in the internal memory right away.
Reasons for using the SD card to transfer / store files:
  • You have more then 50 routes (maximum capacity in the internal memory) you want to take with you
  • Files are already in the GPX format
  • Back up for your holiday's routes

You can transfer files using the SD card following this procedure:
  • In Mapsource, use "save as"
  • Select in the box "save as type..." the format *.gpx
  • You can now either save the file on your hard drive or copy it on the Zumo's SD card directly
  • Make sure you created a folder on the SD card named :/Garmin/GPX/ and store all .gpx files in there
  • If you disconnect your Zumo from the USB or you replace the SD card in the Zumo's slot, it should ask (after about 30 seconds) "new data found; do you want to import?"
  • Select yes and the route gets imported onto the internal memory.

[Q] Is the Zumo ETA to a destination accurate?
[A] Yes…. and No…….. Not a helpful answer but it’s the subject of great debate here It seems that the Zumo’s ETA’s are decided by an average road speed based on speed limits for a given type of road and many in some countries claim a good level of accuracy while many in other countries claim wild discrepancies. The logical assumption is that the differences are down to traffic density.

[Q] How do I find the distance to my destination?
[A] Touch the green bar at the top of the map screen while on a route, then touch "View Map" and the distance and time will be at the bottom of the screen; or press the screen button (third hard button from top) to get to the compass screen. Then touch "More" or the (+) key to change the data fields.

Triplog & tracks handling

[ Q ] My tracklog seems to be missing! Where is it?
[ A ] If you have updated your Zumo to at least firmware version 3.00 your tracklogs, or "active logs" as they are also called, are stored in the Zumo in the following path: .../Garmin/GPX/Archive/1.GPX to (maximum) 20.GPX
These tracklogs are archived at about 10.000 track points.
Only the latest (current) track points can be viewed in the Zumo itself and are shown when selecting "retrieve from device" when connecting to Mapsource.
All archived files must be opened with your computers explorer.

Bluetooth related

MP3 related

[Q] How many songs can the Zumo handle?
[A] No matter what size card you use, the zumo will only recognize the first 1000 songs.

[Q] What is the best way to store MP3's on an SD card
[A] Create a directory on the card named 'mp3' (or any name you choose). Create additional sub-directories within 'mp3' to hold your songs. If you have very few subdirectories and hundreds of songs in each, your Zumo startup time may be too long for your liking. Users report that having no more than a couple dozen songs per subdirectory will result in good startup times.

[Q] Why can't I play music from iTunes on the Zumo?
[A] iTunes native file format is AAC and the Zumo will only music in MP3 format. You can set iTunes to rip the music from CDs in MP3 format instead of AAC but music bought from iTunes music store will need to be converted to MP3 using 3rd party software.

[Q] Can music from ITunes be copied straight to Zumo sd card?
[A] Only if the files are saved within iTunes as MP3's.
If you bought your music from the iTunes store, they are not MP3's and you'll have to convert them.
If you did not select MP3 as the file format in iTunes before you started importing your music, you'll have to convert those files.
Once they are converted to MP3 they can be drag and drop copied directly to your SD card with no problem.

[Q] Why does Zumo crash when a particular mp3 song starts playing?
[A] That mp3 file could be corrupted for various reasons. Corrupt mp3s can be repaired with or similar validation tools.

Installing your Zumo on your bike

[Q] Need help w/installing my Zumo on a H-D FLHT?
[A] - Zumo - Harley Davidson FLHT Installation Guide (account on is needed)

[Q] I am having troubles with AUTOCOM
[A] Then read this thread on : Autocom the final solution! (log in required)