Sygic app can pull maps from Sygic directory / Maps (stored on the SD card or phone memory, still only one never in both places).

We have two kinds of maps: Nauteq (NQ) and TeleAtlas (TT).

At the very beginning we have in the directory Sygic two default directories for maps Maps_TT and Maps_NQ.

First run Sygic maps selector which offers me to choose the pathes to Maps_TT and Maps_NQ / storage / extSdCard / Sygic (via the explorer)

If you press NQ app automatically renames Maps_NQ to Maps, Maps_TT let it go and start Sygic.
If you press the TT, Maps selector" automatically renames Maps_TT to Maps, Maps_NQ let it go and start Sygic.