SanDisk Extreme 64GB SDXC Memory Card – 170MB/s, UHS-I U3 V30

U3 · V30 · 80MB/s Write

Fast Enough for 4K Video and Bursts

What matters most inside the camera is the minimum sustained write speed, because that decides whether video records smoothly or stops with a “card too slow” error. V30 guarantees at least 30MB/s sustained writing, which covers 4K UHD recording on the vast majority of mirrorless cameras, DSLRs, drones and action cameras, and U3 is the matching UHS rating. Peak write speed of up to 80MB/s helps when you shoot bursts of RAW or high-resolution JPEG photos, clearing the camera’s buffer faster so you can keep shooting. The 64GB capacity holds several thousand photos or roughly an hour or more of 4K video depending on the camera’s bitrate — a sensible size for a day out, and a card you can afford to carry a spare of.

170MB/s Read · QuickFlow

Quicker Offloads at the Computer

Getting files off the card is where time is often lost. The SanDisk Extreme reads at up to 170MB/s using SanDisk QuickFlow technology, so a full 64GB card copies to a computer in minutes rather than a quarter of an hour. The headline read speed needs a reader that supports it, such as SanDisk’s own Professional PRO-READER; in a standard UHS-I card reader or a laptop’s built-in slot, the card still works normally but transfers at the reader’s maximum, typically up to around 90 to 100MB/s. That is worth knowing before comparing numbers: the speed you see depends on the reader as much as the card. Either way, the card is a clear step up from the cheaper Class 10 and U1 cards often bundled with cameras.

Rugged · Temperature-Proof · Waterproof

Built for Shooting Outdoors

SanDisk designs the Extreme range for the conditions photographers actually work in. The card is temperature-proof, waterproof, shockproof and X-ray proof, so a cold morning shoot, rain, a dropped camera bag or an airport scanner are not a threat to your files. It is a full-size SD card, so it fits cameras and devices with an SD slot; for phones, drones and action cameras that use microSD, look for a microSD card instead. A write-protect switch on the side lets you lock the card so photos cannot be deleted or overwritten by accident. SanDisk backs the Extreme SD range with a limited lifetime manufacturer warranty in the UK. As with any memory card, copy important photos to a computer or cloud storage regularly rather than relying on the card as your only copy.

Right choice if you…

✔ Shoot 4K video on a mirrorless camera, DSLR or camcorder
✔ Take bursts of photos and want the buffer to clear quickly
✔ Shoot outdoors and want a card built for rough conditions
✔ Want a reliable, recognised card at a sensible size and price

Consider something else if…

✘ Your device takes microSD — this is a full-size SD card
✘ You shoot high-bitrate 4K or long bursts — the SanDisk Extreme PRO writes faster
✘ Your camera records 8K or uses UHS-II — look for a V60/V90 UHS-II card

SanDisk Extreme 64GB SDXC — Technical Specifications

In the Box

Frequently Asked Questions

Is it fast enough for 4K video?

Yes. It is rated V30 and U3, which guarantees at least 30MB/s sustained writing — the rating most cameras require for 4K UHD recording.

Will I get 170MB/s on my computer?

Only with a reader that supports SanDisk QuickFlow, such as the SanDisk Professional PRO-READER. In a standard UHS-I reader or built-in laptop slot it transfers at the reader’s maximum, typically up to around 90 to 100MB/s.

Does it fit my phone or drone?

Only if the device has a full-size SD slot. Phones, most drones and action cameras use microSD cards instead.

What is the difference from the SanDisk Extreme PRO?

Both are U3 V30 cards. The Extreme PRO has higher read and write speeds, which helps with long bursts and high-bitrate 4K; the Extreme is the value choice for most cameras.

What warranty does it have?

It is covered by SanDisk’s limited lifetime manufacturer warranty in the UK.

Condition

Brand New — Retail Packaging

Warranty

Manufacturer warranty (SanDisk)

Delivery

4–5 Working Days · Fully Tracked

Also Available at maibo