SanDisk 256GB (Class A1) MicroSD Card
Those searching for the absolute BEST performance for their Galaxy S8 will want to buy a microSD card with an "A1 rating". This new technology from SanDisk delivers the fastest performance we've ever seen for storage. It's called the A1 specification. Instead of Class 10, UHS-1, or any of those other crazy markings on an SD chip -- look for "A1".
Essentially SanDisk's new 256GB A1 microSD card is way faster than anything released over the past few years. And is guaranteed to make our phones open apps and games quicker. Better performance throughout.
"A1 can manage random read input-output access per second (IOPS) of 1,500 and write IOPS of 500, so it can quickly open apps and process accompanying tasks, such as audio, graphics, saved profiles and in-app permissions."
The biggest difference is with load times on our phones. Launching apps or games is noticeably faster. It sounds like typical "press marketing" but this one is real. All microSD cards in 2017 will be aiming for this type of performance. It's a bit more expensive than most 256GB micro-SD cards, starting around $199. Now a few months later it's often priced under $130. Giving you the most storage physically possible and the best performance at the same time.
Or a regular 256GB Ultra Class 10 can be found for $126 which is still plenty fast.
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