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Question about USB 2 transfer speeds.

  • 28-08-2020 5:28pm
    #1
    mrtom
    Registered Users, Registered Users 2 Posts: 700 ✭✭✭


    Question about USB 2 transfer speeds (W7 i3 4Gb.)
    Copying a file (Mp4 -935Mb ) from the laptop to a Micro SD card via adapter to a USB 2 port.
    Speed settled at 8 MB/second. Speed seems slow for USB 2 .
    Have attached image with SD spec +

    Why is it so slow?


Comments

  • #2
    smuggler.ie
    Registered Users, Registered Users 2 Posts: 4,257 ✭✭✭smuggler.ie


    mrtom wrote: »
    Question about USB 2 transfer speeds (W7 i3 4Gb.)
    Copying a file (Mp4 -935Mb ) from the laptop to a Micro SD card via adapter to a USB 2 port.
    Speed settled at 8 MB/second. Speed seems slow for USB 2 .
    Have attached image with SD spec +

    Why is it so slow?
    This is not USB2 limitation. And you have this many variables there
    30px-SD_Class_10.svg.png SD card min sequential write speed 10MB/s(theoretical), but who are "platinet", how much they adhere to standards and where the product come from, what cable/adapter, so on...
    I would not be surprised nor put to much expectations in to it
    history of boards 2021




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