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Reeldive,
I went from a garmin 178C to a 545S model. Both use different size SD cards. I took my old unit with me to the GPS store where I bought I new unit. They downloaded my numbers to a computer and then to a SD card.Then they plugged it into the 545S and downloaded the old numbers.I now have my old numbers on an SD card that I can update along the way. The 545S is awesome!!!
John D.
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