Thread: How to backup Nuvi NV (region41) with sd

How to backup Nuvi NV (region41/154) with sd

To make the NV backup with sd:

(Important note :NV backup is not the backup of Nuvi files , but it's the NonVol memory backup,it contains Nuvi ID, all your maps codes, probably your Nuvi registration date on myGarmin and first satellite fix etc. Everything is in reg 41, all in these few bytes.
Note: In many newer devices, from 2xxx series 2014/15 onwards, NV is present in region 154 *See 'Update' Below.
NV backup is your nuvi "personal" backup ,dont share it on public forums or you can risk someone clones your Nuvi)
Do not attempt to load an NV backup from another unit to your own unit, even if the same model.

NOTE:Nuvi 3560 SG/MY HWID 1521 boot.bin doesn't support rrgn command at all,so one can't dump regions from this device.


1-Create a "Garmin" folder in an empty sd.
2-In Garmin directory create a directory named "Updater".
3-In Updater create a directory named as your nuvi HWID number, it must be 4 digits eg: 0971
4-In the above folder copy Ldr.bin . What is Ldr.bin? It is your firmware boot.bin you can extract with RGN_tool

Spoiler: RGN_Tool.exe

[Only registered and activated users can see links. ]

and rename it as Ldr.bin.
5-So copy it in "XXXX" (nuvi HWID) folder along an update.txt made with notepad where you'll write this command :

rrgn,41,1:/41.bin
reboot

Originally Posted by Ellinas

For newer devices like 3597, 2797 etc (2013 & later) you should change the script in update.txt because MicroSD has been changed from 1 to 2

From
rrgn,41,1:/41.bin
reboot
To
rrgn,41,2:/41.bin
reboot

Originally Posted by Giomen

Anyway you must have backup in this case too:
rrgn,41,1:/41.bin
But this would be located on RWFS drive but not SD. I think you can find it there (in RWFS).

6-Insert the sd in your nuvi, you'll see at boot a software loading message and nuvi will write your NV backup in sd. Let it reboot, shut it down, remove the sd and keep your Nuvi NV backup in a safe place.

To restore it replace command with:

Instructions:
xrgn,41,1:/41.bin
reboot

*UPDATE:
In newer MTP devices, 2xxx series 2014/15 onwards, NV is present in region 154 and the path to the card is again 2 so write:
rrgn,154,2:/154.bin
instead of rrgn,41,2:/41.bin


PS: If you don't do it ,you can be one of many users posting here
[Only registered and activated users can see links. ]