Western Digital Purple 256GB
Score: 50/100
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 WD Purple SC QD101 256 GB microSDXC is an industrial-grade card built for 24/7 surveillance with high endurance and built-in health monitoring. It tolerates extreme temperatures and harsh environments but offers modest read/write speeds compared with newer U3 cards.
| Attribute | | |
|---|---|---|
256 GBbest | 256 GBbest | |
24 MB/s | 150 MB/sbest | |
24 MB/s | 30 MB/sbest | |
3 years | 10 yearsbest | |
| ↓ lower better | 5.67 g | 4.5 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(2) | ||
Maximum Read Speed (MB/s) | 24 MB/s | 150 MB/s |
Maximum Write Speed (MB/s) | 24 MB/s | 30 MB/s |
Compatibility(1) | ||
Compatible Devices | Surveillance cameras with microSD slots; supports card health monitoring in compatible devices | 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) | 5.67 g | 4.5 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers highlight the WD Purple SC QD101 as a purpose-built, durable solution for surveillance systems, emphasizing its endurance, health monitoring, and suitability for AI-enabled edge cameras. They note its slower write speed relative to premium U3 cards but value reliability for constant-write workloads.
Everyday users consistently praise the card's reliability and durability in harsh environments, noting that it rarely fails even after months of nonstop recording. Complaints focus on the slower write speed and occasional incompatibility of the health-monitoring feature with certain camera brands, as well as its higher cost versus standard consumer cards.
“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.
