Although, the performance on this GPS was slow it was all the same functional and then all of a sudden I am receiving the following message: PLEASE INSERT THE SYSTEM SD CARD TO CONTINUE, even though the card is in. I cannot access the navigation part at all. I thought perhaps the SD card was corrupted so I purchased another one and reinstalled the maps, but I still received the same message. Everything else on the menu seems to function, i.e. tools, pics, etc. Can you help me? I am ready to throw it out.
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