Will this high-resolution files then work on my nüvi 1370 and what's about the names?
For the 1370 it's the D3084000A.JCV (Europe 2011.40) with the size of around 320 MB.
Let's say, I will take the D2504030A.JCV (from 37xx) and rename it to D3084000A.
Will it work then with in high-definition?