Snooper S7000 Sat Nav

Hello,
I have a Snooper S7000 Venturer (Thr Motorhome) and liked it so much I bought what I thought was a Truck Mate for my Son. Unfortunately, although the sd card is Truck Mate it dosn’t work because the unit turned out to be a Venturer. My Son lost his job, so the sd card is going begging, if anyone wants to make an offer. Now I have a Venturer without an sd card. My question is, can I simply copy from my own card to a blank one or are they encryptedor something ?