Ultra high-capacity microSD cards are a promise mostly unfulfilled. The SD Association approved the SDXC spec back in January 2009, which supported memory cards up to 2TB. Granted, that was a theoretical maximum at the time. It took the industry a whole 10 years (!!!) to actually bring 1TB microSD cards to the market and 2TB microSD cards have simply never materialized. Why is that? Turns out there are reasons and most of them are pretty straight forward.
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