SanDisk Ultra 256GB microSD
Score: 90/100
Gigastone 256GB microSD
Score: 98/100Rankings
The Gigastone 256 GB microSDXC offers strong 4K video capability, solid durability and a unique 5-year data-recovery warranty, making it a dependable mid-range choice. Real-world write speeds fall short of the advertised maximum, which may limit high-bit-rate use cases.
The SanDisk 256GB Ultra microSDXC offers high capacity, fast read performance and rugged durability, but its write speed is limited and it lacks 4K video certification.
| Attribute | | |
|---|---|---|
256 GBbest | 256 GBbest | |
150 MB/sbest | 130 MB/s | |
30 MB/s | 85 MB/sbest | |
10 yearsbest | 5 years | |
| ↓ lower better | 4.5 g | 0.57 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(5) | ||
UHS Speed Class | U1 | UHS-I |
Maximum Read Speed (MB/s) | 150 MB/s | 130 MB/s |
Maximum Write Speed (MB/s) | 30 MB/s | 85 MB/s |
Speed Class | Class 10 | C10 |
Application Performance Class | A1 | A2 |
Compatibility(1) | ||
Compatible Devices | Android smartphones, tablets, Chromebooks, Windows laptops, Nintendo Switch (not Switch 2), cameras with SD slot | GoPro, DJI, Drone, Security Camera, Nintendo Switch, Smartphones, Tablets, PC, Camera, DSLR, Dash Cam, Camcorder, Surveillance, e-Reader, etc. |
Warranty(1) | ||
Warranty Period (years) | 10 years | 5 years |
Physical(1) | ||
Weight (g) | 4.5 g | 0.57 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers highlight the Ultra 256GB as a solid, value-driven choice for Full HD video and Android app storage, praising its fast read speeds and rugged build while noting its limited write performance and lack of 4K support.
Everyday users appreciate the card's reliability, capacity, and durability, often noting it works straight out of the box and improves app responsiveness, but many complain about slower write speeds and the inability to handle 4K video.
“Works perfectly”
“Writes are slow on large transfers.”
“Fast read speeds make file transfers quick”
Professional reviewers praise the reliable 4K capture and durability, noting the free 5-year data recovery as a unique value add while cautioning that real-world speeds can be lower than advertised.
Everyday users appreciate the robust build and long warranty, but many report write speeds that don't match marketing claims and occasional freezing on lower-end cameras.
