I have downloaded map of Europe to SD card using TTactivator and then R-link. The map shows when I connect to Tomtom Home as being on the card, but when I update meta and reboot my TomTom there is no sign of the map. All other maps download directly onto the device are working perfectly fine. Is there a setting on the VIA to change to SD card use? I am probably missing some simple step somewhere.
Thanks to all involved in developing TTactivator and R-link, fantastic software. Especially tutorials.

Have now, after repeatedly trying. got it to work. I think the problem was with the original downloading of the file rather than the loading on to the SD card. And also getting the SD card to format in the TomTom.

Good you've got it to work.
Failure looked like forgotten last steps "Update Meta to Device" and "Reboot Device".