Samsung's new 256GB microSD card is so fast no devices support it yet

It's incredible how much storage now fits into a fingernail-sized microSD memory card. Last year, SanDisk crammed 200GB into a microSD card and now Samsung's gone and made a 256GB microSD with the world's fastest read and write speeds — even faster than SanDisk's own new 256GB microSD card it touted as the world's speediest only a week ago. SEE ALSO: SanDisk crammed 200GB into a fingernail-sized microSD card Samsung's new UFS (Universal Flash Storage) microSD cards come in 32, 64, 128 and