Western Digital Purple 512GB
Score: 82/100
SanDisk Ultra 256GB microSD
Score: 90/100Rankings
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.
The Western Digital Purple 512 GB microSDXC card is a surveillance-optimized solution offering high endurance, health monitoring and extreme-temperature durability, though its real-world write speeds fall short of advertised peaks.
| Attribute | | |
|---|---|---|
512 GBbest | 256 GB | |
60 MB/s | 150 MB/sbest | |
60 MB/sbest | 30 MB/s | |
3 years | 10 yearsbest | |
| ↓ lower better | 0.57 gbest | 4.5 g |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage & Capacity(1) | ||
Capacity (GB) | 512 GB | 256 GB |
Performance(3) | ||
UHS Speed Class | UHS-I | U1 |
Maximum Read Speed (MB/s) | 60 MB/s | 150 MB/s |
Maximum Write Speed (MB/s) | 60 MB/s | 30 MB/s |
Compatibility(1) | ||
Compatible Devices | Optimized for Surveillance (24/7) systems | Android smartphones, tablets, Chromebooks, Windows laptops, Nintendo Switch (not Switch 2), cameras with SD slot |
Warranty(1) | ||
Warranty Period (years) | 3 years | 10 years |
Physical(1) | ||
Weight (g) | 0.57 g | 4.5 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the WD Purple for its 96-layer 3D NAND, health-monitoring feature, and firmware tuned for sustained writes, positioning it as best-in-class for surveillance.
Everyday users rate the card highly, highlighting its durability, stability and seamless integration with popular camera systems, while noting slower-than-advertised write speeds and occasional formatting hiccups.
“Works perfectly”
“Writes are slow on large transfers.”
“Fast read speeds make file transfers quick”
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.
