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: Ensure the file contains the actual hex keys. A common sign of a bad dump is a file that is 0 bytes or contains "dummy" text. Lockpick_RCM steps to re-dump your keys if yours are missing?

Once the process completes, turn off your Switch and insert your SD card into your computer.

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The prod.keys file contains essential cryptographic keys that Nintendo uses to encrypt their content. These keys are crucial for hactool to decrypt and process certain files. Without the correct prod.keys file or if hactool cannot find it, operations like decrypting firmware updates, game dumps, or other encrypted data will fail.

If it’s empty or has garbage text, re-extract keys.

: %USERPROFILE%\.switch\prod.keys (e.g., C:\Users\YourName\.switch\prod.keys ). 2. Manual Keyset Selection

Remember: The prod.keys warning is more of a notification than an error. Your primary goal should be confirming that your keys file is loaded correctly, after which hactool will function as expected. For most users, specifying the -k flag is the cleanest, most reliable solution. Happy extracting!

Yes, but Mariko units require additional steps. You'll need to use the /switch/partialaes.keys file along with a brute-forcing tool like PartialAesKeyCrack. Mariko units have unique keys and protected keyslots for key slots 12–15:

If you do not want to place the keys in the default user directory, you can explicitly tell hactool where to find them using command-line arguments.