But that card isn't just large, it's also tipped to be fast with read speeds of up to 160MB/s and write speeds of up to 90MB/s. Western Digital says that makes it more than 50 percent faster than current SanDisk Extreme UHS-I microSD cards. It uses the SD Association's A2 specification for laster launching of apps, too.
The card's design makes promises, as well. It's shockproof, waterproof, X-ray-proof, and can operate in a wide temperature range, from from a frigid 13 degrees Fahrenheit up to a burning 185 Fahrenheit.
Not surprisingly, you'll pay for the privilege of all that space in something smaller than a penny: The card will sell for $300. Compare that to the current stepdown "Ultra" 400GB model with slower transfer speeds that sells for around $231 on Amazon.
Samsung's iPhone X fighters.: Hands-on with
: All of CNET's coverage from the biggest phone show of the year.
Mobile World Congress 2018
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Dec 9•Here's every Galaxy S phone since 2010
Jun 1•All-screen, no-notch Vivo Nex phone officially lands June 12
Mar 29•CNET UK podcast 537: Huawei goes colourful and Andy secures his home