Amazon.com: SanDisk Extreme 400GB MicroSD UHS-I Card with Adapter - Up to 160MB/s with MobileMate USB 3.0 MicroSD Card Reader : Electronics
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Amazon.com: SanDisk 400GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-400G-GN6MA : Electronics
Sandisk Extreme 400gb Micro SD on clearance at US Costco for $24.97. YMMV : r/OdinHandheld
Buy Wholesale Hong Kong SAR Hot Offer For Sandisk Extreme Pro 400gb Micro Sd Card 64gb 128gb 256gb 512gb 1tb Sandisk Extreme Pro & For Sandisk Extreme Pro 400gb at USD 7