Time doesn't matter as long as you eventually get the whole update ok. Some of the map updates are very large and will be slow on a slower connection, plus there may be others downloading at the same time.

Time doesn't matter as long as you eventually get the whole update ok.

updating the garmin nuvi-12

You may need to manually restore or rename the file after the map update.

Although the specific steps are not detailed in this FAQ, the cloning method can be adapted to the newer Garmin model series devices.

To use this procedure on these devices, you must first set your computer to expose the hidden .system folder.

If your device operates in MTP mode (Media Transport Protocol), change it from MTP to Mass Storage mode before you continue.

There may be some other folders and files that were downloaded into the .system folder of the SD card.

Depending on your Garmin device, these files may include such things as the timezone map (gmaptz.img), voice recognition files or Traffic Trends database.

Create folder Map on the SD card and move these three files into it.

You can then rename the files from gmapprom to any name of your choosing, but keep the .img, and extensions.

Even my ancient Tom TOM One was quicker (till it was dropped on the floor and broke...) What speed is your Internet connection?