Brand new memory card needs to be formattted

[Zazabar]

I'm using Dolphin 5.0 and every time I either import a real Gamecube memory card to use on Dolphin or use Dolphin to create a new memory card, my games tell me it needs to be formatted. I'll format through the game and save to it, but I get that message any time I load a new game up and the saves never register.