GFS (Grandfather-Father-Son) Retention is a long-term backup retention strategy that allows you to retain recovery points at different intervals, such as daily, weekly, monthly, and yearly, based on a specified schedule. It is designed to meet archival and compliance requirements by keeping backups for extended periods, ensuring that you have historical recovery points at various intervals.

• Daily Recovery Points: These are retained for a specific number of days. For example, you might retain the last 30 days of recovery points.
• Weekly Recovery Points: Retained for several weeks. You could retain one recovery point for each week for a specified duration (e.g., 12 weeks).
• Monthly Recovery Points: These are kept for months. For instance, one recovery point for each month, typically representing the end of each month.
  
• Quarterly Recovery Points: These are kept for 3 months. For instance, one recovery point for 3 month, typically representing the quarter of the year.
• Yearly Recovery Points: Retained for years, offering long-term backup storage for archival purposes.