Company is threatening criminal prosecution for backing up company data to personal drive. what type of lawyer do I need?

Misappropriation of confidential organization information is a loss of intellectual property. This misappropriation is most probably a breach of your employment agreement. In some instances based on your planned disclosure to third parties, you may become criminally liable. Hire an attorney who has expertise in trade secret law and some criminal law in your ex-employer work location state.  Disclaimer: The response is general in nature and cannot be construed as legal advice. If you would like to have legal advice, then please consult any competent attorney privately to discuss your case and establish a proper attorney-client relationship. I only work through my website at https://affordabletrademarkattorney.com/