Western Digital Purple 256GB
Score: 50/100
Silicon Power 512GB
Score: 100/100Rankings
A 512 GB microSDXC U3/V30/A2 card delivering up to 170 MB/s read and 150 MB/s write, rugged durability and high-endurance options, suited for 4K video, Android apps and demanding outdoor use.
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 GB | 512 GBbest | |
24 MB/s | 170 MB/sbest | |
24 MB/s | 150 MB/sbest | |
3 years | 5 yearsbest | |
| ↓ lower better | 5.67 g | 0.3 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage & Capacity(1) | ||
Capacity (GB) | 256 GB | 512 GB |
Performance(3) | ||
UHS Speed Class | U1 | U3 |
Maximum Read Speed (MB/s) | 24 MB/s | 170 MB/s |
Maximum Write Speed (MB/s) | 24 MB/s | 150 MB/s |
Warranty(1) | ||
Warranty Period (years) | 3 years | 5 years |
Physical(1) | ||
Weight (g) | 5.67 g | 0.3 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.
Professional reviewers consider Silicon Power's 512 GB U3 cards reliable mid-tier options that deliver solid 4K video performance and useful A2 app acceleration, highlighting durability, endurance features and a long warranty as key strengths, while noting they don't match the top speeds of SanDisk or Samsung.
Everyday users praise the cards for consistent 4K recording, good durability and the long warranty, especially noting the High Endurance model's reliability in dashcams, but also mention occasional speed variability, confusing model labels and incompatibility with the upcoming Switch 2.
