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Copy the three files from the Garmin folder on the SD card to the Garmin folder on the Nuvi.You’ll get the message that there’s no enough space. You have to delete them first because for some reason, you can’t just overwrite them. Delete the gmapprom.img, gmaporom.unl and gmapprom.gma files from the Garmin folder on the Nuvi.It will now be recognized as the Garmin device. Delete the garmindevice.xml file from the Garmin folder on the SD drive so the SD drive will no longer be recognized as the Garmin device.
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They will be named gmapprom.img, gmaporom.unl and gmapprom.gma. After the download is complete, you will have 3 maps files in the Garmin folder of the SD card.I ran the firmware update as per the instructions from the Garmin website and two. I did this as I read some other comments that the Garmin webupdater application has (in some cases) caused corruption.
Garmin nuvi 255w update with img file upgrade#
The SD card will now be recognized as the Garmin device. Hello All, I recently downloaded the Nuvi 660 firmware upgrade from the Garmin site to upgrade to v2.70. Copy the file named garmindevice.xml from the Garmin folder on the Nuvi to the Garmin folder on the SD drive.Connect the Garmin device to the computer.Create a folder named Garmin on the SD card.Garmin says it will only accept up to a 4GB card for the Garmin Nuvi 660, however I used an 8 GB card with no issues. Update This Garmin forum discussion suggests that WebUpdater will restore a gmaptz.img file although you may need to remove the old gmaptz.img file first. With a corrupt or altered filename, you nuvi likely doesnt have room to reinstall or update City Navigator. Get a SD card for format it with FAT32. If the two corrupt files have corrupt filenames as well, get back to us.
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Here’s what I did to get the latest maps. When I tried to use Garmin Express to update my maps on my Garmin Nuvi 660, it said I didn’t have enough space so it would only download a partial map of my choice (Southern US and Mexico or select areas of the U.S.