You thought SanDisk’s 128GB microSD cards were insane? The company has just announced another huge milestone — a whopping 200GB of data inside a chip smaller than the size of a nickle. It’s a UHS-1 Class 10 chip, which means it can transfer data at up to 90 megabytes per second.

So why not 256GB, the natural step up from 128GB? It’s likely SanDisk was unable to physically fit enough circuitry, doodads and whatever else makes these things tick inside such a compact form factor. It’s possible that could change with refined engineering techniques in the future, but for now this is as high as it gets.

You shouldn’t bat an eyelash at 200GB. It’s absolutely insane, and it’s even crazier to know that it can work in any device that supports microSDXC cards of 64GB or higher (which includes the newly-announced HTC One M9 , but unfortunately not the just-as-fresh Samsung Galaxy S6 ).

Of course, you’d have to be willing to spend the $400 that this thing will cost to start so if you have that sort of money to throw around on micro storage chips you’ll likely be able to afford a smartphone that can utilize it. The chips are due Q2 2015.

[via SanDisk]