Amazon.com: SanDisk Ultra 400GB MicroSD XC Class 10 A1 UHS-1 Mobile Memory Card up to 100MB/s Read Speed (SDSQUAR-400G-GN6MN) with Mini MemoryMarket MicroSD Memory Card Reader : Electronics
Micro SD Card 400GB High Speed Class 10 Micro SD SDXC Card with Adapter
Amazon.com: SanDisk 400GB Micro SDXC Memory Card Extreme Pro Works with GoPro Hero 8 Black, Max 360 Action Cam U3 V30 4K Class 10 (SDSDQXCZ-400G-GN6MA) Bundle with 1 Everything But Stromboli MicroSD
This 400GB microSD card is just $82 on Amazon for a limited time! - PhoneArena
Sandisk Extreme 400gb Micro SD on clearance at US Costco for $24.97. YMMV : r/OdinHandheld