Of course:
- if you are traveling to Eastern Europe, use only EE hnr files
- if you are traveling to Western Europe, use only WE hnr files
- if you are traveling all over Europe, use only full EU hnr files
logical, right?


I wonder...
why do you need whole europe content?
Are you traveling, from the UK, via the Baltic countries, to Turkey and then to Russia? All within one quarter?
Are you a trucker? Need also truck files (ftr, truck poi)? Again - you travel the aforementioned path, all within one tour?

It's called hamster syndrome

Always use only content that you really need.