Hi JasonLee,
Please allow me to continue with the topic of migrating datas to SD Card.
Below is the directory tree of my nüvi internal memory (I've cut off most irrelevant files to make the image easier to read) :
As you can see from above, I've stated which file is which map together with it's file size.
Those 3 maps were preloaded when the time I bought it.
Those TXT files I created myself to help identify which file is which map.
Here's my SD Card structure:
As you mentioned before, the
SDCARD\Garmin\ folder can only contain 1 map.
The other 2 maps I can put in
SDCARD\Map\ which does not have much limitation.
Let's make it this way for example:
- MfM NT 2012.10 save in SDCARD\Garmin\ <-- Use this as primary map
- MSM NT 2012.10 and CN NT 2012.10 save in SDCARD\Map\ <-- for backup purpose
Now, if I switch to
City Navigator or
MSM later, will I still have the
Junction View if the associated JCV files was already inside
SDCARD\Garmin\JCV\?
My concern is, will the other 2 maps become wasted if I move them this way?
And, I will definitely want to also keep a copy of
cGPSmapper map, we never know it could be a lifesaver in case I have problem with the NT maps like I had earlier.
I don't know if I listed these out clear enough? I'm sorry if my language and post layout confuses you.
* I've already backup everything from the device, so you can guide me the unsafe way. 
* 
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I'm sorry for that! 
