So put the old sd card back in the console so its as it was when purchased, connect the lead, hold B, power it on and the PC should see it so I can copy the games over to a folder, then swap the sd card back to my new one, and repeat but then copy the games from the it PC to the console.
Thanks, I'll give it a go tomorrow.
For some reason, when I tried to do it direct with the sd card in the PC, it would bong when I put it in, but it didn't show up anywhere, so I couldn't access it.