I saw somebody mention on another post that if you only fish a few different lakes, you can download them individually onto micro SD cards.... anyone know if this is true? If so how is it done? I have a micro Helix 7 g2 and really only need a few lakes... looking for a cheaper option. I bought a card online the other day used and when it arrived, but only could it not be updated because it was too old, but it was also not micro. Would really like to find a card without spending hundreds


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