SanDisk Extreme microSDXC 512GB vs SanDisk 512GB Ultra microSDXC Card

Both cards hold 512GB and come from SanDisk, so the real split is speed and durability. The Extreme is the UHS-I U3 card built for sustained writes, which makes it the pick for action cameras, drones and 4K video, and it carries a limited lifetime warranty. The Ultra is a Class 10 card aimed at everyday storage: phones, tablets, dash cams and music libraries. Owners of the Ultra rate it highly for reliability in light use, while Extreme buyers pay more for write speed they actually need.

• Choose the SanDisk Extreme if you record 4K video, shoot bursts on an action camera or drone, or move large files and want faster sustained writes.
• Choose the SanDisk Ultra if you need bulk storage for a phone, tablet, dash cam or music collection and do not record high-bitrate video.