SanDisk 256GB Extreme GO microSDXC UHS-I Memory Card | Up to 240MB/s Read / 160MB/s Write | A2 App Performance | V30 Video Speed Class | 4K UHD + 5K Video | UHS Speed Class 3 (U3) | Compatible with Android Smartphones, Action Cameras, Drones | Rugged: Temperature-Proof, Waterproof, Shockproof, X-Ray Proof | SD Adapter Included | 2-Year Warranty

The SanDisk Extreme GO 256GB microSDXC is the higher-capacity step up from the 128GB variant in the same Extreme GO line, with the same 240MB/s sequential read speed but an increased write speed of 160MB/s — a meaningful upgrade for sustained recording workloads where the 128GB’s 120MB/s write ceiling can become a bottleneck. The 40MB/s additional write throughput gives the 256GB card more headroom for simultaneous 5K video capture from high-bitrate action cameras, multi-stream recording on DJI and similar drone platforms, and burst RAW photography workflows where continuous sequential writes run for longer before the buffer flushes. For users who record primarily in 4K at standard bitrates, the practical difference between 120MB/s and 160MB/s write is smaller; the upgrade becomes relevant at higher bitrates (100Mbps+), longer uninterrupted recording sessions, and devices that write faster than 120MB/s internally. The 256GB capacity doubles the recording time relative to the 128GB at the same bitrate — at a 4K 100Mbps recording bitrate, 256GB provides approximately 5.7 hours of continuous footage versus the 128GB’s 2.8 hours. V30 video speed class (minimum 30MB/s sustained write) and U3 UHS class confirm 4K video readiness. A2 Application Performance Class (4,000/2,000 IOPS read/write) confirms app-on-card performance for Android devices. Temperature-proof, waterproof, shockproof and X-ray proof. SD adapter included. 2-year warranty.