ONTAP Autonomous Ransomware Protection analyzes real-time file activity metrics including data entropy, file extension anomalies, and abnormal IOPS spikes to detect and mitigate ransomware attacks targeting NAS workloads. It uses pre-trained machine learning models to achieve 99% accuracy in identifying ransomware patterns, creates automated recovery snapshots upon threat detection, and integrates with SnapMirror for disaster recovery and third-party tools for forensic analysis. The system receives frequent security updates independent of ONTAP upgrade cycles, allows customizable detection thresholds, and supports multi-admin verification for configuration security. While newer versions using ARP/AI provide immediate protection for FlexVol volumes, traditional deployments utilize a learning mode period of 7-30 days to establish behavioral baselines before activating full protection.