SanDisk Extreme PRO microSDXC V30 vs Gigastone 256GB High Endurance Pro microSD

Buy the SanDisk Extreme PRO if you shoot 4K video, burst photos or run apps from the card; its V30 rating, A2 app performance and 200MB/s read speed are documented and it has a large base of owner ratings behind it. The Gigastone High Endurance Pro is the pick for dash cams, security cameras and other devices that write constantly, where its endurance focus matters more than peak speed. On build, both are UHS-I Class 10 cards with the usual waterproof and shock claims, but SanDisk publishes full speed and temperature figures while Gigastone's listing gives only the class.

• Choose the SanDisk Extreme PRO if you record 4K video, shoot fast bursts, or want a card with published read/write speeds and a strong owner rating record.
• Choose the Gigastone High Endurance Pro if the card lives in a dash cam, security camera or loop-recording device that writes nonstop.