Samsung Micro SD card help - confirming read/write speed

By Tommygunn
Jan 14, 2016
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  1. I've just taken delivery of a couple of Samsung 16Gb, Class 10, UHS-1 micro SD cards and I want to confirm that they are what they say they are.
    I've run a test using 'H2testw' on one of the cards and I got the following:
    Read: 20.5 MByte/s
    Write: 14.7 Mbyte/s

    I also ran a comparison test on my old Sandisk 8Gb, class 6 SD card (I think it's an Ultra but the labels is missing, I do have it somewhere) and got the following:
    Read: 20.2 MByte/s
    Write: 16.6 MByte/s

    I'm no expert on all the conversions and the bits/bytes but I would have expected the Samsung card to be well above the results of the old Sandisk, but they're not.

    Also, how do the results of the Samsung card match up to the stated 'Up to' amounts of 70MB/s and 20MB/s?
    I've tried various conversion tables and the results seem so far apart I'm not sure I'm reading them correctly.




  2. Cycloid Torus

    Cycloid Torus Stone age computing. Posts: 3,006   +657

    What are the specifications for your reader - can it reach top-end or is it more limited?

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