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Transcend UHS-I microSDXC 330S


Transcend introduced the microSDXC 330S, its High-Performance series microSDXC card with the latest A2 speed class to upgrade mobile storage and performance up to maximum read/write speed possible.

With excellent random read/write speeds for fast transfer, app performance, and 4K Ultra HD video recording, Transcend’s microSDXC 330S memory cards are the right fit for microSD devices such as Android smartphone or tablet, handheld game consoles, drones, and action cameras.

The SD Card comes with a two-tones gray and black color out of the box.

It features Video Class 30 (V30) standards which have an excellent read speed of up to 100MB/s and write speed of up to 85MB/s. Therefore, it’s great when used to film 4K UHD video.


We’d tested the read and write speed using CrystalDiskMark and as expected, the results were actually great as promoted.

The Read Speed smashed up to 96mbps which is excellent alongside the 81mbps Write Speed which is also pretty good for an SD Card.


Dimensions (Max.)11 mm x 15 mm x 1 mm (0.43″ x 0.59″ x 0.04″)
Weight (Max.)0.4 g (0.01 oz)
Capacity64 GB/128 GB
Flash Type3D NAND flash
Operating Environment
Operating Temperature-25°C (-13°F) ~ 85°C (185°F)
Operating Voltage2.7V ~ 3.6V
Speed ClassUHS-I U3Class 10V30A2
Sequential Read/Write (CrystalDiskMark)128 GB100/85 MB/s 64 GB100/60 MB/s
Insertion/Removal Cycles10,000
NoteSpeed may vary due to host hardware, software, usage, and storage capacity.


The Transcend UHS-I microSDXC 330S is excellent for users that have a problem with the shortage of storage, the 330S is one great choice when buying an SD Card as the read and write speed is excellent so you won’t face any problem with a shortage of storage up to recording 4k resolution videos as well.