128GB Transcend 330S A2 microSD Review

Yeah…. Enjoy the fastest A2 App Performance, UHS Speed Class 3 (U3), UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recordings, with read/write speeds of up to 100MB/s and 85MB/s respectively. And up to 128GB storage capacity. Yes, this is what you get from the latest Transcend 330S microSDXC card. Perfect for game consoles like Nintendo Switch, smartphone and so on. Interested? Read on…

Special Thanks
This review is possible thanks to below companies. Be sure to check them out too…

Package Content & Design
Transcend 330S microSD has 2 capacities to choose – 64GB TS64GUSD330S and 128GB TS128GUSD330S. All of them support A2, C10, U3 and V30. As you can see, it comes with SD card adaptor that useful for digital camera.

Performance Result
Outstanding sequential reading and writing speed in CrystalDiskMark @ 98 MB/s and 82 MB/s. I believe by using A2 supported card reader will further improve Transcend 330S performance.

ATTO Disk Benchmark is giving the best result for both read and write. Almost the same as CrystalDiskMark.

Anvil’s Storage Utilities tells all the ability of storage performance including Input-Output access Per Second (IOPS) performance for 4K. Great performance again but shy from getting SD Association A2 standard due to my devices do not support SD 6.0 specification. My devices support A1 only.

On real world tests, outstanding performance is what you get from Transcend 330S. BlackVue DR900S-2CH 4K UHD Dashcam, Xiaomi Mi Action Camera 4K, Mi Sphere 360° panoramic camera, Redmi Note 4 and Galaxy Note 8 are getting great results. Passes with flying colours no doubt. Manages to withstand the summer hot temperature on dash cam in car. And able to write up to 4K UHD 100 Mbit/s super fine quality mode on action camera.

Here is AndroBench test result on Android smartphones. 4K IOPS tests show Transcend 330S is getting fast reading and writing speed. Rest assures that all the 4K video and photo will be taken smoothly and safely. Great 4K IOPS result with A1 standard. Shy to get A2 due to limited by my devices…


  • Excellent read & write transfer rate
  • A2, UHS-I U3 & V30 support
  • MLC NAND flash
  • Extreme protections
  • Decent build quality


  • None from me

Excellent performer no doubt. Enjoy uninterrupted 4K video capture on action cameras and drone cameras. Fastest application performance on mobile devices with A2 App Performance support. Interested? More information can be found at Transcend Website. Get yours at Amazon or Lazada.


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