map source vrs custom folder


again thanks in advance to all of those experts who can help this redneck with my dummie questions - using the POI LOADER to install poi's on my nuvi 350 -WHAT IS THE DIFFERENCE BETWEEN Garmin Device / mapsource(advanced) / custom folder(advanced)

CW -------Please Remember Those Who Are Serving & Those Who Have Perished Defending Our Freedom-------1Sgt(Ret)

The difference is

The difference is whether the Custom POIs are loaded directly to your GPSr as Custom POIs, to Mapsource or to a custom folder on (I assume) an SD card.

MrKenFL- "Money can't buy you happiness .. But it does bring you a more pleasant form of misery." NUVI 260, Nuvi 1490LMT & Nuvi 2595LMT all with 2014.4 maps !