This format mirrors the official digital packages downloaded directly from the Nintendo eShop. Update patches, such as version 2.1.0, are almost exclusively distributed in the NSP format, even if your base game is an XCI.
"Metroid Dread NSP XCI Update v1.0.2 + 210 ES (Verified) now available on Nintendo Switch! metroid+dread+switch+nsp+xci+update+210+es+verified
Samus is faster and more responsive than ever, featuring wall-jumping, sliding, and a 360-degree aim. This format mirrors the official digital packages downloaded