I would appreciate some information if I may. The wife has a Garmin Nuvi 255 (a good few years old now, if not older). I would like to know if it is possible to update maps on this device. I am ultimately looking to use a satnav in Europe in the summer and am just investigating the possibility of being able to upgrade. I have looked around this forum but cannot see much regarding the Nuvi. The device currently only has a UK map installed from when purchased and does not have an sdcard slot of any kind. I have tried to download some .img files of Croatia and change the Map Info to this file. This did load but said that it couldn't find a satellite. I wasn't sure if this is because I was in the UK when I loaded it (therefore way out of range) or not. I didn't want to play too far and end up bricking it without having a reference point from which to work from.
If someone has a viable link or pointer where I can understand more about this I would appreciate it, as all I can find is mainly TomTom related.
Thanks in advance.