Quote Originally Posted by xXNuviXx View Post
Hi here's a screenshot of my internal drive, and inside the "Garmin" folder, of that drive.
Just to give you an insight in how I can add another map, which is a "gmappsupp.img" file.
Not gmappsupp, it's gmapsupp.

You seem to have two detail maps in the Garmin folder already (gmapbmap is the basemap, so leave that). gmapprom is probably the OEM detail map supplied with the unit going by the date of it's .sum file. gmapsupp is a secondary [supplementary] detail map. Back them up to your PC and remove them, then proceed with one of Smokefree's suggestion by simply using copy and paste to add the required image/s to the Garmin folder of the unit and/or the SD card. The .sum files are only checksum files, you can delete them if you want.

PS: Please don't post asking for this knd of basic information which can be found in the Tutorials without cluttering up the map thread, and only quote the relevant part of another post, or if it's the one immediately before yours no quote is usually necessary.