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
LINSAY New LINSAY High Speed Micro SD Card 128 GB V30 4K Ultra HD with Adapter in the Tablet Accessories department at Lowes.com
Best microSD cards of 2023: Speed, capacity, cost compared | ZDNET
SanDisk's 1TB microSD card is now available - The Verge
Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System
Micro SD Cards in Memory Cards - Walmart.com
Everything You Need to Know about SD Cards | B&H eXplora
New SD card specs tout 128TB max, up to almost 1GB per sec - CNET
SanDisk® High Endurance microSD™ Card Class 10, Dash Cam Memory Card | Western Digital
Best microSD cards of 2023: Speed, capacity, cost compared | ZDNET
Amazon.com: ROVE Ultimate Micro SD Card microSDXC 256GB Memory Card with USB 3.2 Type C Card Reader 170MB/s C10, U3, V30, 4K, A2 for Dash Cam, Android Smart Phones, Tablets, Games :
The World's Biggest Micro SD Card - Integral 512GB Micro SD - YouTube
Micro SD Card 256GB Class 10 High Speed SDXC SDHC Memory Card Wholesale Pricing | eBay