Im a Newbei and a littel bit helpless.

I have a Go 710 with all contents (Maps, Navcore etc) only on a SD-Card. The previous owner has much junk installed on the card,

so i want to make a clean install of a navcore on the SD-Card. But what is to do ?????

I download some navcore-files but i dont know what to do. I search the internet and many forums for a solution, but i can't find one.

Can everybody help me ?

Sorry for my bad english but im from Germany

Greetings Foxy25