Below is a comprehensive guide to everything you need to know about it.
To keep NSC Builder running smoothly, adopt these habits:
Make sure there are no blank lines or accidental text characters at the very top of your text file. The file should strictly contain key_name = hex_value formatting. Summary Checklist Requirement File Names Accepted prod.keys or keys.txt Primary Directory C:\Users\YourUsername\.switch\ Secondary Directory Inside the NSC Builder root or ztools folder Source Tool Lockpick_RCM homebrew payload nsc builder keys.txt
If you open a keys.txt file in a text editor, you will see dozens of lines formatted as a key name followed by a long hexadecimal string. Examples of keys stored inside include:
Raw game cartridge dumps traditionally used for game archival and physical backup emulation. Below is a comprehensive guide to everything you
Look for a sub-folder named ztools or simply paste it into the main root directory alongside the executable script ( NSCB.bat ). Ensure the file is named exactly keys.txt . Troubleshooting Common Errors 1. Error: "keys.txt or prod.keys not found"
Connect the Switch to your PC via USB. Use TegraRCMGUI to inject the Lockpick_RCM.bin payload. Summary Checklist Requirement File Names Accepted prod
Keys are tied to specific Nintendo Switch firmware versions. If a game requires a higher firmware (e.g., ) than the keys you possess (e.g., ), NSC Builder will fail to process that game.
This comprehensive guide explains what the keys.txt file is, why NSC Builder requires it, how to legally obtain it, and how to configure it properly to get your tool up and running. What is NSC Builder and Why Does It Need Keys?