“I” means UHS-I, and “II” means UHS-II. Please make sure your device supports the same standard to benefit from the increased speeds.
UHS Speed Class
UHS Speed Class
UHS Speed Class includes UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3). UHS Speed Class 1 supports a minimum 10MB/s write speed, whereas UHS Speed Class 3 supports at least 30MB/s write speed.
Video Speed Class
Video Speed Class
Video Speed Class is defined to answer a demand for high resolution and high quality 4K8K video recording. V60 (60 MB/s) and V90 (90 MB/s) can support 8K resolution, while V6, V10 and V30 capture high-definition and 4K resolution and guarantee minimum sequential write speeds of 6 MB/s, 10 MB/s and 30 MB/s respectively.
Application Performance Class
Application Performance Class
Application Performance Class assures minimum random and sequential performance speeds to run and store smartphone apps. Application Performance Class 1 (A1) delivers minimum random read of 1,500 IOPS and random write of 500 IOPS. Application Performance Class 2 (A2) delivers minimum random read of 4,000 IOPS and random write of 2,000 IOPS
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