Perform a full side-load [from your computer without connecting to the Internet]. Load the data + map files supporting the Here Maps app from your Windows machine. Here Maps [was/is also known as HereWeGo Maps] is an offline Global Positioning System [GPS] application. Offline means your Samsung mobile phone becomes a full GPS device [just like TomTom] without the need to connect to the Internet. Please download the easy instructions below:
This teaches us how to avoid installing apps to the internal storage [storage that came with the phone device from factory] because we might need that storage space for more important things.