I have an older Zumo 550 that needs it's map updating.
When i got the unit maps were from about 2009, so done some reading and downloading and move across from pc to the 550 using simple windows explorer (no Garmin software on pc yet) and replaced old "gmapprom.img" with new version of "gmapprom.img" which is 360mb compared to older which is 1.24GB, so i presume i have updated map files from old europe to new "Garmin City Navigator Europe NT 2018.10 UK & Ireland" is that is, is it really that simple?
I see so much talk about NT option, locked, unlocked, using folders instead of a .img file.
I did try to copy of new version of "city navigator europe nt 2018.10" for western europe but was told not enough memory so i presume this is where the sd card comes in, unit did come with a 16GB card but i can't access it via windows so i was going to use some boot discs to see if i can see what is on it but unsure what to format it as i presume FAT32.
Yes i am that new to this kind of thing so ANY help would be more then welcome.
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