When managing backup files for the Nintendo Switch, users frequently leverage NSC Builder to merge base games with updates and DLCs, convert NSP files to XCI, or compress libraries into NSZ files. However, even the most stable releases of NSC Builder will fail, freeze, or throw decryption errors if the underlying crypto keys are outdated or misconfigured. The Crucial Role of keys.txt in NSC Builder
: Every time a major Nintendo Switch firmware update is released, you should re-dump your keys to ensure compatibility with games released for that new firmware. Key Comparison: NSP vs XCI nscb keystxt better