Western Digital today introduced a new 400GB SanDisk Ultra microSDXC UHS-I card, which it says is the world's highest-capacity microSD card available on the market.

The new 400GB card comes two years after the company introduced its 200GB SanDisk Ultra microSD card, with the new version doubling the storage capacity. According to Western Digital, this new milestone was achieved through leveraging proprietary memory technology, design, and production processes that allow for more bits per die.

sandiskmicrosd400gb

"Mobile devices have become the epicenter of our lives, and consumers are now accustomed to using their smartphones for anything from entertainment to business. We are collecting and sharing massive amounts of data on smartphones, drones, tablets, PCs, laptops and more. We anticipate that storage needs will only continue to grow as people continue to expect more sophisticated features on their devices and desire higher quality content," Jeff Janukowicz, research vice president, IDC. "We estimate mobile device users worldwide will install over 150 billion applications alone this year, which require a ton of memory on all of our favorite devices."

Designed for use in Android smartphones, drones, cameras, and other devices that use microSD storage, the new card can hold up to 40 hours of full HD video and it features transfer speeds of up to 100MB/s.

sandiskmicrosd400gb2
The 400GB SanDisk Ultra microSDXC UHS-I card will be available from SanDisk and other major retailers soon. It is priced at $249.99.

Top Rated Comments

Delgibbons Avatar
105 months ago
It's ok at least it'll at least add easy storage boosting for the MacBook Pro.......
Yah just pop it in an SD adapter then into the Macbook's SD sl.....

Oh.
Score: 9 Votes (Like | Disagree)
JesterJJZ Avatar
105 months ago
Can't wait to pop this into my iphone...oh wait...
Score: 6 Votes (Like | Disagree)
acorntoy Avatar
105 months ago
Jokes aside very interesting for those looking for bargain MacBook Air machines. Should add tons of storage to future proof.
Score: 5 Votes (Like | Disagree)
dannys1 Avatar
105 months ago
Jokes aside very interesting for those looking for bargain MacBook Air machines. Should add tons of storage to future proof.
*Tons of slow storage.

Quite handy to archive on, it's like a small spinning drive - not great for much else. It's 100MB/s the Samsung 960 Pro variant in my MacBook Pro is 3000MB/s
Score: 5 Votes (Like | Disagree)
Sunday Ironfoot Avatar
105 months ago
400GB in the palm of my finger.
Score: 3 Votes (Like | Disagree)
CarlJ Avatar
105 months ago
All I can think of, looking at this is "Raspberry Pi Zero W fileserver".
Score: 3 Votes (Like | Disagree)

Popular Stories

iPhone 17 Pro and Air Feature

Two iPhone 17 Pro and iPhone Air Colors Appear to Scratch More Easily

Friday September 19, 2025 10:02 am PDT by
As reported by Bloomberg today, some of the new iPhone 17 Pro and iPhone Air models on display at Apple Stores today are already scratched and scuffed. French blog Consomac also reported on this topic. The scratches appear to be most prominent on models with darker finishes, including the iPhone 17 Pro and Pro Max in Deep Blue, and the iPhone Air in Space Black. Images Credit: Consoma ...
iOS 26

iOS 26.0.1 Coming Soon, Likely With iPhone Air and iPhone 17 Pro Fix

Thursday September 18, 2025 9:17 am PDT by
Apple is preparing to release iOS 26.0.1, according to a private account on X with a proven track record of sharing information about future iOS versions. The update will have a build number of 23A350, or similar, the account said. It is likely that iOS 26.0.1 will fix a camera-related bug on the new iPhone Air and iPhone 17 Pro models. In his iPhone Air review, CNN Underscored's Henry T. ...
iphone 17 pro max techwoven

Here Are The Best Cases You Can Buy for Your New iPhone 17 and iPhone Air

Friday September 19, 2025 6:46 am PDT by
Apple's new iPhones launch today, and there are plenty of options to choose from when it comes to protecting your new device from drops and scratches. In this article, we're taking a look at some of the best options for iPhone 17, iPhone 17 Pro, and iPhone 17 Air cases, as well as a few charging accessories. Note: MacRumors is an affiliate partner with some of these vendors. When you click a...
iPhone 17 Pro Colors

iPhone 17 Pro Max Teardown Reveals Qualcomm's Snapdragon X80 Modem for 5G

Friday September 19, 2025 7:39 am PDT by
While the iPhone Air is equipped with Apple's custom C1X modem for cellular connectivity, all of the iPhone 17 models are outfitted with Qualcomm modems still. A teardown video shared on Chinese platform Bilibili today (via Reddit) appears to confirm the iPhone 17 Pro Max is equipped with Qualcomm's Snapdragon X80 modem in particular. The same modem is likely used in the iPhone 17 and iPhone ...
iOS 26 on Three iPhones

iOS 26's Liquid Glass Design Draws Criticism From Users

Wednesday September 17, 2025 2:56 pm PDT by
It's been two days since iOS 26 was released, and Apple's new Liquid Glass design is even more divisive than expected. Any major design change can create controversy as people get used to the new look, but the MacRumors forums, Reddit, Apple Support Communities, and social media sites seem to feature more criticism than praise as people discuss the update. Complaints There are a long...
iphone 17 pro inside

iPhone 17 Teardowns Confirm SIM and eSIM-Only Battery Capacities

Friday September 19, 2025 8:39 am PDT by
YouTube channel REWA Technology today shared an iPhone 17 Pro teardown video, offering a closer look inside the model with a SIM card tray. We are still waiting for repair website iFixit to share a more comprehensive teardown of the latest iPhone models, but this video provides a good look in the meantime. The device features various internal design changes, including larger rear camera...