The Nintendo Switch reads exFAT or FAT32. FAT32 cannot handle files larger than 4GB. Super Mario 3D World + Bowser’s Fury is approximately (NSP). If your SD card is FAT32, you must convert the single large NSP into a split NSP ( .nsp , .nsp.1 , .nsp.2 ) or an NSZ . This is often labeled as “convert for FAT32.”
Using NSZ compression is lossless. Use NSZ_Converter : Super Mario 3D World Bowsers Fury -NSP--Convert...
But beyond the technical jargon, this write-up explores: The Nintendo Switch reads exFAT or FAT32