Sygic web sites faq!
There is a recent issue with the new Android version 4.4 KitKat as it restricts applications from accessing the external SD card.
Currently we are working on a fix, but it is a complex issue and we will most likely fix this in one of the next updates.
In the mean time, we can only recommend you to keep the whole Sygic folder on the internal memory.
We apologize for this temporary inconvenience.