I have a Garmin nuvi 2455LM, North America NT 2012 map factory installed on the internal memory. I've installed City Navigator Europe NT 2013.30 (unlocked) on a micro SD card with MapSource. I’m being able to see the maps on MapSource and transfer them to the SD card but when I look for the installed maps on the GPS, only the North America NT map is shown. I have already tried:

• Formatting the SD card to Fat 32
• Configuring the nuvi for Mass Storage (MTP Settings -> Mass Storage)
• Renaming the SD card to Garmin SD
• Installing the “gmapsupp.img” on the SD card on a folder named “Garmin” and I also tried naming it “Maps”

Help please!!