Because .nsp files are often too large to fit directly onto a FAT32 drive (which limits single files to 4GB), players must use specialized installer tools:
This is a proprietary archive file format. Large Switch games (such as Resident Evil Revelations , which occupies several gigabytes) are typically compressed into a .rar archive to reduce download size and preserve file integrity across servers. Technical Specifications & Performance Context residentevilrevelationsnsprar