Okay, did you format your SD card with guiformat according to the wiiu.hacks.guide ? Super Mario 3D world should be 1,66GBs. The eur version should have this number at the end of the folder - it is the TitleID: 0005000010145D00yes, EU console. Not 100% sure about the games but most likely EU.
The American TitleID is this: 0005000010145c00