You can import two types of files from a memory card:
GPX files - these become tracks after import.
ITN files - these become routes after import.
ITN files are TomTom itinerary files. Other users can record itinerary files and and share them with you, or you can download both ITN and GPX files tools such as Tyre Pro.
To import one or more routes and tracks from a memory card, do the following:
Insert a memory card into the card slot on your TomTom GO.
If routes are found on your memory card, a message confirms this.
Select Import Routes.
Select one or more routes from the list on your memory card for import.
Select Import.
You see the message Importing tracks. Your routes are imported onto your device.
When you see a message that your routes have been imported successfully, remove your memory card.
To view your imported routes and tracks, select My Routes in the Main Menu.