How Long Does CCTV Footage Last?

One of the most common questions people ask is “How long does CCTV footage last?” The answer depends on several factors such as storage capacity, number of cameras, video quality, and recording settings. Understanding this helps you choose the right CCTV system for your home or business.

Factors That Affect CCTV Footage Duration

1. Storage Capacity

The size of the storage device plays a major role.

  • 500GB, 1TB, 2TB, 4TB, or higher HDD
  • Larger storage means longer footage retention

2. Number of Cameras

More cameras record more data.

  • 1–2 cameras: Footage lasts longer
  • 8–16 cameras: Footage overwrites faster

3. Camera Resolution

Higher resolution uses more storage.

  • 2MP (Full HD): Moderate storage use
  • 4MP / 5MP: Higher clarity, more storage
  • 8MP (4K): Best quality, fastest storage usage

4. Recording Mode

Average CCTV Footage Retention Time

Storage Size Cameras Resolution Approx. Duration
500GB 2 Cameras 2MP 7–10 Days
1TB 4 Cameras 2MP 10–15 Days
2TB 4 Cameras 4MP 15–20 Days
4TB 8 Cameras 2MP