Thread: Garmin Nuvi MapSet format- how to store them in your device

Does merging maps (i.e. in effect making them bigger) make the GPS operate more slowly? Currently already the maps load v. slowly on the screen.
Tx.

Hi all,
I have downloaded CNEUNT 2012.10 from Multiupload. All the files: mapsource, ASR, G2S, JCV, etc. Unlocked them, but when I wanted to copy into may device, Nuvi 3790, something happened and device cannot see the maps. I copy it into System (hidden folder), both gmasupp.img and gmap3d.img. I have tried and recopy all of them. Same, nothing. If I put these files on a SD card it works OK. At least gmapsupp.img.
What I have done wrong?
Tx.