Because I also use a (quite old) Garmin Topo Map Germany which is dongled to its 8GB SD card, I install the Topo Active on the device's internal memory. Since some years the map is too big for the internal memory but it was possible to choose with Garmin Express a region (west, central, east) of the map so that it fits to the available memory.
With the recent version of the map (2024.10) or the last update of Garmn Express (7.23?) I was not able to choose the region anymore and to install the map to the internal memory.
But after I installed the map with a separate SD card inserted to the device, I noticed that there were three maps installed on the device: one IMG-file in the internal memory and two IMG-files on the SD card (all with about 3GB). And actually the files contain again the three regions west, central and east and work of course separately.
You simply have to copy the corresponding files of the region you need to the internal memory (after deleting the "wrong" region). And of course you should keep a backup of all the corresponding map files...
