Thank you all for the replies. I had not realised the larger SD compatibility.
So I have now just plugged the Wii it all seems to work. (I had to youtube removing parental lock first.)
Then followed the slow memory recall and feeling stupid when not seeing how to do things (where to type the MAC...
I have just bought another wii from fleebay (haven't had chance to plug it in yet). But I have noticed an abundance of larger capacity sd cards for sale on the same site with lots of games etc... I have also seen on nintendo site there has been an update for the Wii with combatibilty for upto...