7 of 8 people found the following review helpful
Avoid third-party memory cards,
This review is from: GameCube 251 Slot Memory Card (GameCube) (Video Game)
All I can say is only purchase official Nintendo memory cards. I was unfortunate enough to have a third party card, and lost all my data after about 20 hours gameplay. I wasn't too pleased when I had to repeat it all over again. The official cards never go wrong, but in my experience it is the norm for unofficial cards to become corrupted. If you want to spend less on an unofficial card, go ahead, but one day you will lose all your data and wish you had taken Nintendo's advice.
BTW. I believe the card with 1019 blocks of memory wasn't released in the UK as there was a problem with it. Best to go for the 251 block version.