SanDisk Extreme PRO 32GB microSDHC (UHS-I, U3/V30/A1)

Fast 32GB microSD for 4K on action cams and drones

A SanDisk Extreme PRO 32GB microSDHC UHS-I card, rated U3, V30 and A1, that reads at up to 100MB/s and writes at up to 90MB/s for smooth 4K capture.

It rents with a full-size SD adapter and is tested and cleared before every rental.

This is the SanDisk Extreme PRO 32GB microSDHC card, SanDisk's flagship high-speed line, built for content creators who need fast, reliable storage in a tiny form factor.

It runs on the UHS-I bus and carries U3 and V30 speed class ratings, which guarantee a minimum sustained write of 30MB/s.

That headroom is what keeps high-bitrate 4K UHD video stable, so a GoPro, action camera, drone or mirrorless body does not drop frames mid-recording.

Sequential read reaches up to 100MB/s and sequential write up to 90MB/s, so photo bursts clear quickly and offloading footage to a laptop is fast.

The A1 app-performance rating adds quicker random reads, which helps when the card runs apps or media on a phone.

It rents with a full-size SD adapter, so the same card works in a microSD slot on a GoPro or drone, and in a DSLR, mirrorless body, card reader or laptop SD slot when you drop it into the adapter.

The Extreme PRO build is hardened for the field: it is rated waterproof, temperature proof, shock proof, X-ray proof and magnet proof, so footage survives travel, rough handling and airport scanners.

At 32GB it is best as a fast spare or for short 4K sessions rather than a full day of continuous recording.

Every card is read/write tested and wiped before it goes out, so you get a clean, working card on the day of your shoot.