He knowingly and clearly broke laws by stealing and disclosing classified information. I think he was ethically correct to do so, and his act qualified as civil disobedience, but that's why the US government is after him.
Media is calling Snowden a "leaker" rather than whistleblower, because Trump has been considering pardoning him. The only thing the media cares about is 'orange man bad'.
>Trump says he is considering pardon for leaker Edward Snowden