Modern iPhones have incredible cameras. When you open the Camera app, switch to Video, and see "4K" in the top right corner, you know you are about to capture incredibly crisp footage. But that quality comes at a massive cost to your storage.
Here is exactly how much space 4K video consumes and why you might want to switch back to 1080p.
The 4K Video Size Breakdown
Video file sizes depend on two things: resolution (4K vs 1080p) and frame rate (24, 30, or 60 frames per second). Apple uses High Efficiency Video Coding (HEVC) by default, which saves space, but the numbers are still huge.
Here is how much space one minute of video takes up on a modern iPhone:
- 720p HD at 30 fps: ~40 MB
- 1080p HD at 30 fps: ~60 MB
- 1080p HD at 60 fps: ~90 MB
- 4K at 24 fps (Film style): ~135 MB
- 4K at 30 fps: ~170 MB
- 4K at 60 fps (Smoothest): ~400 MB
The Long Video Problem
A one-minute clip of your dog at 400 MB does not seem terrible until you film a school play or a concert. If you record a 15-minute video in 4K at 60 fps, that single file will take up 6 Gigabytes of storage.
To put that in perspective, 6 GB is equivalent to about 1,500 standard photos. If you have a 128GB iPhone, just ten of these videos will completely fill your available storage.
Should You Shoot in 4K?
Unless you are editing the video on a computer, zooming in heavily on the footage, or playing it back on a massive 65-inch 4K television, you probably do not need to shoot in 4K.
For posting to Instagram, TikTok, or sending videos to family via iMessage, 1080p at 60 fps is the sweet spot. It looks incredibly smooth and sharp on a phone screen while using only a quarter of the storage space.
How to Change Video Resolution
You can quickly change your video resolution directly in the Camera app. Tap the "4K" or "HD" icon in the top right corner of the screen while in Video mode.
To change the default setting permanently:
- Open the Settings app.
- Scroll down and tap Camera.
- Tap Record Video.
- Select 1080p HD at 60 fps.
How to Find and Delete Old 4K Videos
If your phone is already full of massive 4K clips, you need to clean them out. You can use the hidden iOS storage menu (Settings > General > iPhone Storage > Photos > Review Personal Videos) to sort by file size.
Alternatively, use a tool like Swipe Photo Cleaner to review your entire video library full screen. It helps you quickly identify blurry clips, accidental pocket recordings, and massive videos you no longer need, letting you delete them with a simple left swipe.