With Black Friday looming on the horizon like the dark lord of some retail apocalypse (well, that's how we see it - we have to write about it), you're going to see almost unending deals on external storage for your smartphone. And, sure, maybe if you don't care about how fast that card is because it's going in a smart TV box or just being used as a photo storage dump, a simple $10 microSD card can be just what you're looking for.

But if you want the best microSD card you can buy right now, there's actually only one obvious choice: SanDisk's new line of App Class 2 "Extreme" cards (we promise, this isn't an ad).

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