p55pp55p wrote:I understand that JVC under separate Europe regions are junctions for that area but what confuses me is huge difference in file size
Garmin gave the later of these old devices more extensive JCV's ( more intersections covered ) as they generally had larger internal storage. As most are using SD cards due to current lack of internal storage for all of Europe now, it's logical to choose the "Large" option.
[Please Register or Login to download file] Those IMG files for East and West are way smaller if I count all together separate Europe maps.
The sum of the regions will be greater than All of Europe (West & East) as the coverage overlaps each other.