It's a Samsung S3mini. I know that it broke in Android 4.4 (i have no experience with 4.3) and, at least partialy, the fault lies with Android itself as, apparently, Android 4.4 (4.3?) changed the way it handles extenal memory.
However, there are apps which are able to save data to the external memory using the same phone and android version. An example is Navmii's Navfree for Android. While, as a navigation app, it is not as good as Mapfactor it does store the maps on the external memory (it even asks where to store it when downloading maps). So it is possible to do.
I was hoping that this issue was recognised and will be dealt with in a future update of the program.
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