Before spending money on a new card, try re-formating the old one. There really shouldn't be a serious issue with the card after only one year and a simple re-formating should take care of it.
If that doesn't work, simply remove the card from your camera and see what kind of card it takes, most likely an SD card. The buy a card at least as large (in capacity) as the one that came with the camera, go larger if you can afford it. No need to spend money on premium names, get the cheapest they have.