GCN Formatting Error

[calmwaters]

Actually I've had this problem for quite a while now. So I go into the GameCube's data management menu to delete save files or just see them and I get this: "The device in slot B must be formatted before it can be used. Would you like to format it?" And instead of clicking yes, I shake my fist violently and curse at my system.

So I click yes; it tries and comes back to me with "The format was successful, but the data is corrupted." I'm sure one of you knows how to fix this. And yes, I have another card which is the exact type as this one.

 

[tbgtbg]

Is this an official Nintendo card or 3rd party junk?

Are you trying to put Japanese and other region saves on the same card? That won't work right.