I have no real need for this in the USA given the GPS in my car or my phone so. I just bought the unit off the web for a European trip with that being the #1 goal. I suspect, looking at the setup I bought used, and your explanation, that these maps were not bought from Garmin direct. This choice is unlikely since the update process should have removed the older map in nuvi storage unless the update was done through the 'clone method.'Ģ) The newer North America and European maps are not Garmin maps but some Garmin-compatible open-source map.ģ) The maps on SD cards, if they appear as Garmin maps and if they both work on multiple devices and work after being moved to a different SD card, may well be pirated Garmin maps and should not be discussed on this web site. In this case, the files can be moved to another SD card and still used in your nuvi 255 (but the SD card will not show the map on any other Garmin GPS since the unlock code is specific for your device only).

Learning the filenames and sizes of the various files on the SD cards may help identify which of the following options give the results you've found.ġ) A Garmin map update was performed to the nuvi 255 and the update was installed through the SD option: If so, they should not be copy-able to another SD card and still work. I think the assumption was that the maps on the SD card were purchased from Garmin on a SD card.

No such file locking it to the SD card it came on. It came on an SD card much bigger than the +-3gb it is so i copied it to a 4gb card from an 8 and it works fine.

I can & have moved the 2015.10 map to any SD card i want.

Nuvi 255w maps download free