Inside Switch Nsp _best_ May 2026

hactool --keyset=keys.txt game.nsp --outdir=extracted/ Output structure:

NSPs are essentially packaged as a hierarchical file system (HFS0) inside a PFS0 (Partition File System 0) wrapper. 3. High-Level NSP Structure A standard NSP is not a single monolithic file but a directory-like structure exposed through the Nintendo Switch’s file system APIs. When viewed as a file, it appears as an HFS0 image containing: inside switch nsp

extracted/ ├── 0100000000010000.Program.nca ├── 0100000000010000.Control.nca └── 0100000000010000.Logo.nca Decrypting the Program NCA: hactool --keyset=keys