Reviews |Lexar Professional 1066x MicroSDHC Card

Lexar Professional 1066x MicroSDHC Card Review

Fast and cheap there's little not to like about this MicroSD

Lexar Professional 1066x MicroSDHC Card

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Our Verdict

Through-out the test the Lexar Professional 1066x MicroSDHC Card performed well keeping up with the maximum speed requirements required by both the GoPro Hero9 Black and the DJI Mini 2.

In use, there was little to fault with the cards performance, but as with other black, grey, monotoned MicroSD cards, I did feel a little more colour would be helpful.

Those small MicroSD cards are difficult to handle in cold, damp conditions and when you drop one, or it accidentally falls from the card case, they’re really hard to find. I suppose that more comes down to the care of the user than the card itself.

Then there are the read-write speeds. In the GoPro Hero9 Black and DJI Pocket 2, with settings set to high, the card kept up without fault. However, tested with the Blackmagic Disk Speed Test the read-write speeds didn’t quite come up to those quoted by Lexar.

At the end of the test, I’m impressed by the overall performance, especially for a UHS-I card. But more so when you consider the price. For the capacity and speed, quoted or tested, it’s unbelievably cheap. If you need a high capacity high-speed card, then the new Lexar Silver Series is well worth consideration.


  • High Capacity
  • High Speed
  • Great price


  • Not as fast as quoted
  • Difficult to find if dropped

What is the Lexar 256GB MicroSD Card?

Available in five different capacities the latest Lexar Card is designed to keep up with the demands of the latest 4K action cameras, drones and phones.

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Lexar Professional 1066x MicroSDHC Card
As part of the Lexar Silver series of high-performance cards, this compact storage pushes UHS-I technology to the limits on both speed and capacity.


  • Capacity: 32, 64, 128, 256 and 512GB
  • Speed Class: 32GB – Class 10, U1, V10, A1
  • Speed Class: 64GB – 512GB – Class 10, U3, V30, A2
  • Performance: 32GB – up to 160MB/s read
  • Performance: 64GB – up to 160MB/s read, up to 70MB/s write
  • Performance: 128GB – 512GB – up to 160MB/s read, up to 120MB/s write
  • Operating temperature: 0° to 70° C (32°F to 158°F)
  • Storage Temperature: -25° to 85° C (-13°F to 185°F)
  • Dimension (L x W x H): 11mm x 15mm x 1 mm


In this test, I’m looking at the 256GB version of the card and have tested the performance using a GoPro Hero9 Black. This card is equally suited to the latest DJI Pocket 2, DJI Mini 2 and any Android Phone that enables the insertion of additional storage.

The small MicroSD features a grey and black design with white text highlighting the make and model. I prefer my MicroSD cards to be as bright as possible for the simple reason that if you drop it on the forest floor it’s far easier to find.

Lexar Professional 1066x MicroSDHC Card

Aesthetics aside and with the card popped into the GoPro and formated; it’s time to start the test.

At all, resolutions and frame rates tested the card performed without hic-up. Set to the Cinematic preset the card offered 7 hours and 59 minutes, likewise using the standard 1080p settings, the same amount of storage was available.

Finally setting all settings to high and using 4K at 60fps with the bitrate set to 100MB/s the card still enables 5 hours of storage. Far more than the battery of the GoPro.

Lexar Professional 1066x MicroSDHC Card

Again shooting at maximum speed, the V30 speed keeps up with the requirements of the cameras top file demands with staggering ease.

At the end of the ride, I downloaded the files and checked through to see if there was any sign of corrupt or broken files, all checked out fine and all of the files stored on the card were intact and usable.

The next test was to use the Blackmagic Design Disk Speed test to check out the read-write speed.

Lexar quote that the card should have a maximum and minimum transfer speed of 160MB/s read and 120MB/s write. In our test, the results were below this at 93MB/s read and 79.8MB/s write when tested using the Lexar LRW500U-A10U Multi-Card reader.


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1 year ago

How can you give it 4.5 stars if it didn’t achieve anything close to the stated speeds?!