SanDisk 256GB Extreme microSDXC UHS-I/U3 A2 Memory Card with Adapter, Speed Up to 160MB/s (SDSQXA1-256G-GN6MA) - Newegg.com
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SanDisk Extreme 160MB/s UHS-I V30 A2 256GB microSDXC Memory Card Review with speed tests and benchmarks - Camera Memory Speed Comparison & Performance tests for SD and CF cards