Wrong part of Forum.
Browse the Forum, all answer are there. Read, learn.
If maps are on SD, the process is even simpler - you delete old maps and put new ones.
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Aftermarket unit with iGO - for sure, software is not genuine. And maybe you'll have to replace it.
Tutorial section:
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Depending on the software already in the device, the choice of files can be different.
Will be trashed later
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