3aa. Tranfer maps to GPS using Windows PC

Why would you want to do this?

Since you’ve purchased T4A GPS Maps via Downloadable files, and installed them onto your PC, you now need to transfer them to your GPS unit in order to use them on your Garmin GPS unit.


STEP A #

Connect your Garmin GPS Unit to your PC via USB cable.

Uninstall any previous T4A GPS Maps from your GPS unit. (See here for steps)


STEP B #

Open MapInstall / BASECAMP / MapSource that you installed, and transfer the maps to your GPS.

Summary Steps:

  • Find Device
  • Choose device to install maps on (ie. internal GPS memory or SD Card)
    • If your Garmap maps are on your SD card, transfer your T4A maps to the internal memory of your device, alternatively if your Garmap maps are on your internal memory, then transfer your T4A maps to the SD Card.
  • Click ‘Customize’
  • Select maps to transfer
  • Click ‘Continue’
  • Click ‘Install’
  • Click ‘Finish’

Transfer T4A Maps to GPS using Windows:


Via BASECAMP: #

Summary Steps:

  • Menu: Maps > Install Maps (ie. will initiate built-in MapInstall function)
  • Find Device
  • Choose device to install maps on (ie. internal GPS memory or SD Card)
  • Click ‘Customize’
  • Select maps to transfer
  • Click ‘Continue’
  • Click ‘Install’
  • Click ‘Finish’

See Video above on how to use the MapInstall function with BASECAMP to transfer the maps.


Via MapSource: #

IMPORTANT TO NOTE: MapSource can transfer & receive maps, waypoints etc. to and from most Garmin GPS units – the Garmin Drive GPS units don’t always work with MapSource.

Summary Steps:

  • In Menu > Switch to product (ie. to select map to transfer to GPS unit)
  • Then: Tools > Map (ie. this is the Map Tool used to select maps on the screen – maps will turn pink when clicked on))
  • Use Map Tool to select one or more maps.
  • Only the pink selected map areas will transfer to your GPS
  • Then: Menu > Transfer
  • Send to Device
  • Find Device
  • Choose device to install maps on (ie. internal GPS memory or SD Card)
  • Ensure ‘Maps’ is ticked
  • Click ‘Send’

Comprehensive User Guide #

For more comprehensive, detailed steps, please refer to our USER GUIDE: T4A GPS Maps Subscription Download Links (WINDOWS)


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Updated on December 11, 2025

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