SanDisk Extreme PRO 256GB
Score: 100/100
ProGrade Digital Iridium 256GB
Score: 47/100Rankings
The SanDisk 256 GB Extreme PRO SDXC UHS-I offers top-tier read/write performance (200 / 140 MB/s) and rugged protection, making it a strong choice for 4K creators. Its UHS-I bus limits it on cameras that can exploit UHS-II bandwidth, and some users report speed variance with cheaper readers.
The ProGrade Digital Iridium 256 GB UHS-II V90 SDXC card delivers ultra-fast read/write performance and rugged durability, making it ideal for high-bitrate 4K/6K video and RAW burst photography.
| Attribute | | |
|---|---|---|
256 GBbest | 256 GBbest | |
200 MB/s | 300 MB/sbest | |
140 MB/s | 275 MB/sbest | |
— | 3 yearsbest | |
| ↓ lower better | 2 gbest | 15.9 g |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(4) | ||
Video Speed Class | V30 | V90 |
Maximum Read Speed (MB/s) | 200 MB/s | 300 MB/s |
Maximum Write Speed (MB/s) | 140 MB/s | 275 MB/s |
Bus Interface | UHS-I | UHS-II |
Compatibility(1) | ||
Compatible Devices | DSLRs, mirrorless cameras, camcorders, laptops | Canon, Sony, Nikon, Olympus, Panasonic, Fuji, Samsung |
Physical(1) | ||
Weight (g) | 2.0 g | 15.9 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the blend of high read/write speeds, V30/U3 ratings and rugged build, recommending it for 4K creators while noting UHS-I is slower than UHS-II cards.
Everyday users highlight reliable performance, fast transfers and durability, but note occasional slower-than-advertised speeds and occasional shipping delays.
“Works perfectly with my Sony A7 III and Panasonic GH5”
“Fast transfer speeds save time”
“Durable and reliable”
Professional reviewers from B&H, Leica Camera USA and Filmtools commend the Iridium 256 GB card for its rock-solid reliability, V90 certification and error-correction, highlighting its suitability for high-end DSLR, mirrorless and cinema cameras.
Everyday users consistently rate the card five stars, praising flawless 4K recording, lack of dropped frames and the usefulness of Refresh Pro™.
