How to backup Nuvi NV (region41) with sd

**Rising Eagle** · 28th April 2014, 06:19 PM

Neil,

Thank you so much. Your solution worked like a charm. Backup went smoothly. Your suggestion about the clean SD card is spot on. It turns out all my trouble in flashing 6.2 was because I had a Map folder and/or other nuvi related folders/content on the same SD as the gupdate. As an experiment, I renamed all the folders by appending extra characters and making them inert to the nuvi. Then, before I reset anything, I tried the flashing with gupdate all alone in the Garmin folder. It worked beautifully. So my problem is solved. Thank you again for your help.

**3490lmt** · 20th May 2014, 09:13 PM

Hey Neil, it's me again ;D...Got a question for you, does it matter or make any differences if I use the "http://download.garmin.com/software/nuvi34xx_GCDFile__820.gcd" to do the backup instead of my 3490's "GUPDATE.GCD?" Any pros or cons to either one?

**Neil** · 20th May 2014, 10:37 PM

G'day. Best practice is to always use the firmware version which is running on your unit at the time to extract the boot.bin [ldr.bin]. If your current fw is v8.20 then the gupdate.gcd in .System folder will be exactly the same file as 'nuvi34xx_GCDFile__820.gcd' and so either can be used. Compare the hashes and/or file size in bytes [77,757,239 bytes].

**3490lmt** · 21st May 2014, 03:41 PM

Cool! Yep! Everything went smoothly! I'm going to do a backup on my Nuvi 50LM too now

Thanks again Neil!

**bobokom** · 31st May 2014, 08:43 PM

Hi to everyone!
I have 3490 and I tried to backup Region 41 acording to the instructions, but something happend and now when I stars the nuvi screen lights but there is no logo on it and I can`t see it on PC. When I press the upper left corner it goes into preboot mode but updater can`t see it and I can`t use Cure3 tool.
Can you give me som advise or help?

**lolypop000** · 31st May 2014, 08:47 PM

Upload your pack that you use for backup region, so we can see what go wrong.

**bobokom** · 31st May 2014, 09:11 PM

There is no pack. When I backup the region 41 the unit shuts down and there was nothing on the screen for more than 15 minutes.I tried to switch on bt it can`t I desided that it is bricked and opened it, disconected the battery and conected it again and after the powered on but there was nothing on the screen.
That`s all. Is it bricked or not?

**bobokom** · 31st May 2014, 09:17 PM

Sorry but I find what was wrong. ldr.bin was for 3790 and not for 3490. Maybe i bricked it. Can I do something or not?

**lolypop000** · 31st May 2014, 10:06 PM

You must ask kunix for help, he can create rescue pack for you.
Tell him what you do so he can create correct pack.

Smoke free have the same problem with different device and with kunix help he have again working Garmin.