The best approach to handling a data breach involves a balanced and phased response. Immediate isolation of affected systems is crucial to prevent further damage. Following containment, a thorough investigation helps understand the breach's scope and cause, which is essential for effective remediation and compliance with legal and regulatory requirements. Notifying stakeholders should be done based on the investigation's findings to ensure accurate and responsible communication. Finally, implementing preventive measures is key to enhancing the organization's security posture against future threats. This comprehensive approach ensures both immediate and long-term security and compliance.