How Much Storage Do You Need for 4K Video Recording?

Planning a 4K shoot? Learn how bitrate, codec, frame rate and recording duration affect storage requirements.

How Much Storage Do You Need for 4K Video Recording?

4K video gives creators excellent image detail, but it also creates much larger files than traditional Full HD recording.

Before a long recording session, it is important to estimate how much storage you will need.

Why Does 4K Need More Storage?

4K UHD normally has a resolution of 3840×2160 pixels.

Full HD is 1920×1080.

That means a 4K frame contains approximately four times as many pixels as a Full HD frame.

However, file size does not automatically become four times larger. The actual size depends heavily on bitrate, codec, frame rate and camera settings.

Bitrate Is the Key

Two cameras can both record 4K but produce very different file sizes.

For example, one camera may record 4K at 50 Mbps while another records at 150 Mbps.

The second camera will produce much larger files.

This is why storage planning should always consider bitrate rather than resolution alone.

4K 30fps vs 4K 60fps

Frame rate also matters.

4K 30fps records 30 frames every second.

4K 60fps records 60 frames every second.

Higher frame rates may require higher bitrates, resulting in larger files.

For sports, events and slow-motion workflows, this difference can become significant.

Codec Efficiency

H.264 and H.265 are commonly used compressed codecs.

H.265 generally provides better compression efficiency than H.264.

Professional production codecs such as ProRes are designed for editing performance and image quality rather than extremely small files.

As a result, ProRes files can become very large.

Example

Suppose you record 4K video at 100 Mbps.

One hour:

100 × 3600 ÷ 8 ÷ 1024 ≈ 44 GB

Two hours:

Approximately 88 GB.

Three hours:

Approximately 132 GB.

This is only an estimate and actual files can vary depending on the camera and audio settings.

Multi-Camera Production

Multi-camera shoots require special attention.

If one camera produces 44 GB per hour:

1 camera = 44 GB/hour

2 cameras = 88 GB/hour

3 cameras = 132 GB/hour

4 cameras = 176 GB/hour

A six-hour event can therefore create a very large amount of footage.

Storage Planning

For important productions, plan for:

Camera storage
Working storage
Backup storage
Archive storage

Don't treat the camera card as your only copy of the footage.

SD Card Capacity

Common card capacities include:

64 GB
128 GB
256 GB
512 GB
1 TB

The correct capacity depends on recording bitrate and shooting duration.

But capacity is not the only consideration. Your camera may require a specific write-speed class for a particular recording mode.

Use a Calculator

Instead of manually calculating every recording mode, use a 4K Storage Calculator.

Enter:

- Resolution
- Frame rate
- Codec
- Bitrate
- Recording duration
- Audio
- Number of cameras

The calculator can then provide an estimated storage requirement.

Conclusion

4K storage requirements vary significantly between cameras and recording formats.

If you know your bitrate and recording duration, estimating storage is straightforward.

For important shoots, always leave extra capacity and maintain backups.

Good storage planning is part of good video production.