Windows 10: Copy Files from Hard Drive to SD Card - Painfully Slow Transfer

  1. Posts : 1
    Windows 10 Home x64 bit
       31 Jan 2017 #1

    Copy Files from Hard Drive to SD Card - Painfully Slow Transfer

    I am in the process of transferring files from my laptop's hard drive to a 256 GB SD card in the laptop's card reader slot. The transfer started quickly but then it slowed down drastically and has stayed down since. I've looked at some similar posts and tried a few of the fixes that worked for others but none of them have worked for me and I'm still transferring at an incredibly slow pace.

    I should note that I'm transferring music files from my computer to the SD card. I have about 50 GB that I would like to put on the card but it would take me a week at the rate it's going now.

    Anyone have any suggestions?

      My ComputerSystem Spec

  2. Posts : 492
    Microsoft Windows 10 Pro 64-bit
       01 Feb 2017 #2

    SD cards are usually always painfully slow nothing you can do about it unless you spend about 10 times the price and get the faster ones.

    From what I remember the fastest I have gotten is around 8 MB/s on the cheaper type, I have never used the more expensive ones.

    Here are the speed class marks.
    Note: You probably have a class 10Click image for larger version. 

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      My ComputerSystem Spec

  3. Posts : 274
    Windows 10
       01 Feb 2017 #3

    I have SD cards labelled as Class 10 U-I 45 MB/s, under testing with small files I get a writing speed of 18 MB/s. Thus meeting the min spec of such cards.
    I won't buy anything slower than that, or from dubious suppliers.

    Also worth checking cheap Cards for capacity fakes, I use H2testw 1.4

    For your amount of data on my Cards it would take roughly ~60 min to write.
      My ComputerSystem Spec

  4. Posts : 1
    Windows 10 64 bit
       2 Weeks Ago #4

    I have the same problem when transferring music from my C: SSD drive to the memory card slot in my laptop. Unfortunately, the memory card slot only runs at USB 2.0 speed. I resolved the problem by connecting the SDHC card to the laptop in a USB 3.0 to SDHC adapter, through the USB 3.0 connector. BINGO! The writes to the memory card increased from a few hundred KB per second to 8-10 MB per second. I even found a bargain on the adapter on Amazon here:

    Happy copying!
      My ComputerSystem Spec


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