SanDisk Extreme 256GB microSD UHS-I Memory Card

The SanDisk Extreme 256GB microSD sits in the sweet spot for shooters who need speed and space without stepping up to a professional cinema card. Its headline numbers — 245MB/s read and 170MB/s write — are aimed at the stutter-free capture that action cameras, drones, and Android phones demand. With U3 and V30 ratings behind it, the card is built to sustain the data rates that 4K UHD and 5K point-of-view video generate. The 256GB capacity is generous enough for long recording sessions and large libraries of high-resolution stills.

Construction is where the Extreme line makes its case for field use. SanDisk lists an unusually broad set of protections: temperature proof, humidity proof, waterproof, shock proof, drop proof, magnet proof, X-ray proof, and wear-out proof. That combination speaks to a card meant to ride along on a drone or a helmet mount rather than sit safely in a slot. On the practical side, the SanDisk Memory Zone app handles the less glamorous work of backing up, organizing, and transferring footage, available for desktop or Android. It's a card that prioritizes reliable, fast capture for people who shoot in motion.