I have 2 520's and an H2o also and I have never had this problem. I upload and download each of these units all the time. You may call Lowrance and see what the problem is.
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I downloaded my waypoints from my 520 to a SD card. When I tried to upload them to my H2O it said that I had the wrong software.
Is there a way to load these to my H2O?
Thanks
2018 Triton 18TX 115 ProXS 4 Stroke
4-HDS 9 Touch
ACC CRAPPIE STIX
I have 2 520's and an H2o also and I have never had this problem. I upload and download each of these units all the time. You may call Lowrance and see what the problem is.
I replied to your post on the bbc.
------Jason Gilstrap Pro Staff Lowrance / www.getalimitoutdoors.com