This seems to be the cheapest price for this SD card built specially for the Nintendo Wii but it also works for any product with an SD card slot.
This is normally sold for anywhere between £13.99-£19.99 and it also comes with free delivery and 4% cashback if you go through Quidco, making it just £8.63.
Download and store games
Store your game saves
Edit and store photos
Compatible with Nintendo® Wii game console and all other devices equipped with an SD slot
The SanDisk SD Gaming Memory Card line is the must have card for the Nintendo® Wii game console. For maximum performance and to get the most out of all the advanced features on the Wii, you'll need a SanDisk Gaming Card. With SanDisk, you will be able to download and store games, store game saves, and edit and store photos.