Not device's software NAVIGATION software. What version exactly. For example 9.18.....
Clean all content so far used from iGO.
Then try with package from this topic
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put it on card.
See if it works. If OK, then we can continue to try to make workable NG.
In principle, the vast majority of these devices are designed to read software from the card.
Now, whether iGO Nextgen will work by using the standard package posted on this forum, or you will have to use a modified version to install from an SD card, we can't know
First, try to use standard software package, full from SD. If not, then the more complicated part goes. But, one by one...
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