HI: Question on SD protection system

vbimport

#1

Hello, i’m new of the forum, i see that here there are lot of competent people.
i have a problem with an sd that i have bought.

it’s a map for sea, i would like to make backup copy to prevent loss when i go to see.

when i put the backup copy in my gps it doesn’t works.

i heard about copy protection number on the hardware of the sd.

do you have any suggestion to solve this problem??

thanks

Marco (Italy)