How Much Storage Do You Need for Your Reolink Security System? A Guide to NVR Hard Drive Capacity

Quick Answer

For most home setups with four 4K cameras recording 24/7, start with a 4TB hard drive to get about 10 days of footage. If you only record on motion or use lower resolutions, 2TB may be enough. For business or longer retention, plan for 8TB or more. Always check your NVR's maximum supported capacity before buying.

Choosing the right hard drive size for your Reolink NVR can feel confusing, but it doesn't have to be. The amount of storage you need depends on a few clear factors: number of cameras, resolution, frame rate, and whether you record continuously or only on motion. This guide walks you through the math and gives you practical rules to avoid running out of space when you need it most.

Reolink offers several NVR systems, such as the RLK8-1200D4-A with 12MP cameras and the RLK8-800D4 with 4K cameras. Each system supports different resolutions and recording modes, which directly affect storage. By understanding these variables, you can pick the right hard drive the first time and save money.

Key Factors That Determine Storage Needs

Resolution is the biggest factor. A 12MP camera like the one in the RLK8-1200D4-A produces much larger files than a 4K camera. Higher resolution means more detail, but it also consumes storage faster. If you don't need ultra-high detail everywhere, consider lower resolution cameras to reduce storage pressure.

Frame rate also matters. Recording at 15 frames per second (fps) uses less storage than 30 fps. Many systems default to a balanced setting, but you can adjust it in the NVR menu. Lowering the frame rate is an easy way to extend recording time without sacrificing critical evidence.

Recording mode is the third key factor. Continuous 24/7 recording uses the most storage. Motion-triggered recording saves space because the camera only records when something moves. If you're okay with missing the moments before motion is detected, this mode can cut storage needs dramatically.

• Use the Reolink storage calculator on their website to estimate your needs.
• Always buy a hard drive designed for surveillance, like WD Purple or Seagate SkyHawk.

Estimating Storage for Common Reolink Systems

Let's look at a typical four-camera system. The RLK8-800D4 includes four 4K cameras. If you record continuously at 4K and 15 fps, each camera might use about 30 GB per day. That's roughly 120 GB per day for all four cameras. A 4TB drive would hold about 33 days of footage. If you switch to motion-only recording, you might get several months of storage.

For the RLK8-1200D4-A with four 12MP cameras, the file sizes are larger. Each camera could use 60 GB per day or more. Four cameras would need about 240 GB per day. A 4TB drive would last only about 16 days. For a full month, you'd need 8TB or more. This system is great for detail, but it demands more storage.

If you have a dual-lens system like the RLK8-800TM4, remember that each camera records two streams. That doubles the storage compared to a single-lens camera. Plan accordingly, especially if you use auto-tracking features that may record more motion events.

• Check your NVR's maximum hard drive capacity before buying. Some support up to 12TB per bay.
• Use the H.265 codec if available; it reduces file size by up to 50% compared to H.264.

Choosing the Right Hard Drive Size

For a small home setup with two or three 4K cameras, a 2TB drive might suffice if you record on motion only. For continuous 24/7 recording with four cameras, 4TB is the sweet spot for about a week or two of footage. If you want to keep a month of history, go with 8TB or more.

For business or high-traffic areas, err on the side of more storage. You may need to retain footage for compliance or investigations. An 8TB or 12TB drive gives you peace of mind and reduces the frequency of overwriting old footage.

Always consider future expansion. If you think you'll add more cameras later, buy a larger drive now. Upgrading later means reconfiguring your system and potentially losing existing recordings.

• Buy a drive with at least 2TB for basic motion-only recording.
• For continuous recording, use 4TB as a baseline for four cameras.

Decision Rules for Hard Drive Capacity

• Rule 1: Count your cameras and resolution: Multiply the number of cameras by the daily storage per camera. For 4K, estimate 30 GB/day; for 12MP, estimate 60 GB/day. For dual-lens, double the estimate. Write down your total daily usage.
• Rule 2: Decide on recording mode: Continuous recording uses 24/7 storage. Motion-only recording can reduce usage by 50-70%. Choose based on your need to capture pre-event footage. If you can accept motion-only, you can often halve your drive size.
• Rule 3: Apply the 30-day rule: Multiply your daily usage by 30 to get the minimum drive size for a month of retention. Add 20% overhead for system files and future events. A 4TB drive is often enough for 4K systems; 8TB for 12MP or dual-lens.

Storage Considerations for Popular Reolink Systems

• RLK8-1200D4-A: The RLK8-1200D4-A is a 12MP PoE security camera kit that delivers 24/7 full color images, ensuring clear and vibrant video surveillance around the clock. 12MP resolution for high-definition video capture. Higher resolution means larger files. If you choose this system, plan for more storage than a 4K system. A 12MP camera may use twice the storage of a 4K camera.
• RLK8-800D4: This Reolink RLK8-800D4 is a 4K PoE security camera system designed for continuous 24/7 recording. 4K ultra-high definition video quality for clear details. 4K is a good balance between detail and storage. With four cameras, a 4TB drive gives you about a month of continuous recording at typical settings.
• RLK8-800TM4: The RLK8-800TM4 is a 4K Dual-Lens PoE System featuring Auto-Zoom Tracking for enhanced security monitoring. Dual-lens design provides a wider field of view. Dual-lens cameras record two streams, doubling storage usage. Account for this when sizing your hard drive, especially if you use continuous recording.

Which Storage Size Fits You?

Best for

• 2TB: Home users with 2-3 cameras recording on motion only.
• 4TB: Most home users with 4 cameras recording continuously at 4K.
• 8TB+: Businesses or users needing 30+ days of 4K continuous recording.

Not for

• 2TB: Not for continuous recording with 4 or more 4K cameras.
• 4TB: May be tight for 12MP or dual-lens systems with long retention needs.

Sizing your Reolink NVR storage doesn't have to be guesswork. By understanding your camera resolution, recording mode, and retention goals, you can choose a hard drive that fits your needs and budget. Start with our decision rules, and when in doubt, go bigger—you'll thank yourself later when you need to pull footage from weeks ago.