SanDisk's 400GB MicroSD card is just $30 on Amazon
Buy Wholesale Hong Kong SAR Offer For Sandisk Extreme Memory Card Sdsqxa1 Micro Sd Card 32gb 64gb 128gb 256gb 400gb 512gb 1tb & Sdsqxa1 at USD 4.98 | Global Sources
SanDisk 400GB ImageMate microSDXC UHS I Memory Card with Adapter SDSQUA4-400G-Aw6ka - Walmart.com
SANDISK 400GB MICRO SD CARD (NEW)
Sandisk Extreme 400gb Micro SD on clearance at US Costco for $24.97. YMMV : r/OdinHandheld
SanDisk Extreme 400GB microSD Card with Adapter | Costco
Micro SD Card 400GB High Speed Class 10 Micro SD SDXC Card with Adapter
SanDisk Extreme Pro 400GB MicroSD XC Class 10 UHS-I Mobile Memory Card for Motorola One Action Moto Z4 G7 Plus One Vision with USB 3.0 MemoryMarket Dual Slot MicroSD & SD Memory
Sandisk Micro SDXC 400GB Extreme Pro Memory Card Multicolor| Techinn