What Memory Card Do You Need for 4K and 8K Video?

4K and 8K footage look incredible, but they can fill up a memory card faster than you think. The right storage setup keeps your camera rolling, your files safe, and your shoot free from “card full” panic.

Key Takeaways:

• Bitrate matters more than resolution alone Not all 4K footage uses the same amount of storage. A 4K Long GOP file can be manageable, while 4K 60p 10-bit All-Intra, ProRes, RAW, or 8K can eat through cards quickly.

• A 256GB card can hold around five hours of lighter 4K video At around 100 Mbps, 256GB may store roughly five hours of 4K footage. For higher-bitrate 4K, expect closer to one or two hours.

• Speed is just as important as capacity For stable recording, choose cards with the right sustained write speed. V30 may work for lighter 4K, while V60, V90, or CFexpress cards are better for demanding 4K, 8K, ProRes, and RAW workflows.

High-resolution video gives you sharper detail, richer color, and more flexibility in post. It also eats storage fast. 

For professional photographers and videographers, choosing the right type of memory card for 4K videos isn’t just about grabbing the biggest capacity available. It’s about matching your card’s size and sustained write speed to your camera’s bitrate, codec, and recording format, so your footage stays safe from dropped frames, failed recordings, and workflow delays.

At CameraHaus, we’re here to make sure creators have what they need to shoot with confidence. For working professionals, that starts with more than cameras and lenses. It also means having enough fast, reliable storage ready before the first take.

Why Bitrate Matters Most

The biggest factor affecting video file size is bitrate. Bitrate measures how much data your camera records per second, usually in Mbps. The higher the bitrate, the more information your footage contains—and the faster your memory card fills up.

A practical estimate: 100 Mbps uses around 45GB per hour.

That’s why storage for a 4K video can vary so much depending on your camera settings. A lightweight 4K 24p file in Long GOP compression may be easy to manage. A 4K 60p 10-bit All-Intra file can require several times more storage. Move into ProRes, RAW, or 8K recording, and the numbers climb quickly.

How Many Hours of 4K Video Can 256GB Hold?

A 256GB memory card can hold very different amounts of 4K footage depending on the bitrate. The figures below are approximate because usable card space, camera formatting, codec efficiency, and file structure can vary.

This is why “4K video” is not one fixed storage requirement. A wedding shooter recording long ceremonies in 4K Long GOP may get several hours from a 256GB card. A commercial shooter capturing 4K 60p 10-bit All-Intra may need multiple cards just to get through a production day.

What Changes With 8K?

8K is where storage planning gets serious. You’re capturing way more image data than 4K, and many 8K-ready cameras use high-bitrate codecs to hold onto all that detail, dynamic range, and color depth. Depending on your camera, you could be looking at several hundred Mbps—or even past 1,000 Mbps. Yes, your memory card will notice.

At that level, choosing the right memory card for 8K video matters a lot. A 256GB card can feel surprisingly small, giving you less than an hour of footage in some settings—and with high-bitrate RAW or cinema formats, sometimes only minutes. For serious 8K shoots, 512GB, 1TB, or larger cards make much more sense, especially for documentaries, events, interviews, commercial projects, and multi-cam productions.

Codec and Recording Format Matter Too

Bitrate tells you how much data is being written, but codec and recording format explain why.

Long GOP codecs are more efficient and create smaller files, making them useful for events, travel, social content, and long-form coverage.

All-Intra codecs record each frame with less dependency on surrounding frames. They are easier to edit but require much more storage.

ProRes and RAW formats offer strong post-production flexibility, especially for color grading and commercial work, but they demand larger cards, faster write speeds, and bigger backup drives.

The more flexible the file is in post, the more storage you should expect to use on set.

Speed Is Just as Important as Capacity

When choosing a memory card for 4K video recording, don’t just look at the biggest number on the label—check the sustained write speed too. For video, that’s what helps keep recording stable, especially when you’re working with higher bitrates, 10-bit footage, All-Intra codecs, or long takes.

V30, V60, and V90 are the SD card ratings that matter for video because they show minimum sustained write speed. V30 may be enough for lighter 4K work, but once you’re recording higher-bitrate 4K, V60 or V90 is the better call. For demanding 4K, 8K, ProRes, and RAW, many cameras move to CFexpress cards—and for good reason. They’re faster, steadier, and made to handle heavier files.

Using a card that’s too slow can lead to recording stops, dropped frames, missed moments, or even a corrupted SD card. On a paid shoot, that’s not just a small inconvenience; it’s a production risk.

Plan Storage Around the Shoot

If you’re shooting interviews or corporate content, plan around how long the camera will be rolling, not just the finished video. Then add extra space for retakes, pauses, and second attempts.

For weddings and events, pack more cards than seems reasonable. Trust us, the first kiss, vows, speeches, and once-in-a-lifetime moments aren’t waiting for you to clear space. 

For 8K, RAW, or multi-cam productions, your storage plan should include portable SSDs, backup drives, and plenty of editing space too.

A smart rule is to avoid filling cards to the limit. Leave room for extra takes, slow motion, behind-the-scenes clips, and unexpected schedule changes.

The Bottom Line

For basic 4K workflows, 256GB may be enough for around five hours of recording. But crank up the bitrate, and suddenly you’re closer to one or two hours. Once you’re shooting 8K, larger and faster cards aren’t just nice to have—they’re the safe bet.

Whether you’re figuring out storage for 4K video shooting or building a full 8K workflow, CameraHaus helps you find high-performance SD, V60, V90, and CFexpress memory cards perfect your camera, codec, and workflow, so your gear keeps up from first take to final frame.