: The file must be named exactly prod.keys (some users mistakenly use keys.txt or keys.dat ).
Can't extract NCA file from .nca folder · Issue #90 - GitHub
: The file is present but not in the default directory or specified in the command line.
: hactool -k path/to/prod.keys -t nca yourfile.nca
: The program lacks permission to read the folder where the keys are stored. How to Fix the Error