The World's Biggest Micro SD Card - Integral 512GB Micro SD - YouTube
Onevan Class 10 8gb Micro Sd Memory Card Flash Biggest 512gb Class 10 High Speed Microsd Tf Card Карта Памяти - Memory Cards - AliExpress
400 GB is no longer the biggest microSD card available. As of some time in February 2018, there will be a (very likely expensive!) 512 GB microSD card on the market! : r/gpdwin
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New SD card specs tout 128TB max, up to almost 1GB per sec - CNET