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

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  1. Posts : 1
    Windows 10 Home x64 bit
       #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?

    THANKS!
      My Computer


  2. Posts : 822
    Microsoft Windows 10 Pro 64-bit
       #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 10Copy Files from Hard Drive to SD Card - Painfully Slow Transfer-class-10.png

    Copy Files from Hard Drive to SD Card - Painfully Slow Transfer-speed-mark.png

    Copy Files from Hard Drive to SD Card - Painfully Slow Transfer-usb-class.png
      My Computer


  3. Posts : 2,716
    Windows 10
       #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 Computer


  4. Posts : 1
    Windows 10 64 bit
       #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: https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

    Happy copying!
      My Computer


  5. Posts : 1
    Windows 10
       #5

    SD writes at 4-5 KB/sec


    OK, but all this talk of the speed of SD writes doesn't address when the speed is 4-5 KB/sec. I could live with 1 or 2 MB/sec. I have two Dell laptops running Win10 with all drivers updated and that is the speed of SD writes I'm getting on both of them with their SD slots. Both are using Class 10 SD cards. I can boot to Linux on a flash drive and get those MB/sec transfer rates. So what is Win10 getting wrong here?
      My Computer


  6. Posts : 182
    Win 10 rs1 - build 14393.1944
       #6

    Try to shut down your AV (If running Defender, then also shut down Smart screen) ! When transfer files to/from USB/SD-cards
    AV's are often the cause of slow down!

    You can also try a very fast 3. party copy app. - : http://codesector.com/teracopy
    Last edited by Gordon7; 15 Nov 2017 at 17:46.
      My Computer


  7. Posts : 2
    Win10
       #7

    Unable to copy ~80Gigs from SD Card to HDD or another SD Card


    Hi everyone. I am brand new here.
    I know this is an old thread but i'm at my wits end trying to backup my micro SD card. This is the most relevant forum conversation I could find anywhere.

    I have about 80Gigs of mp3s, pictures and videos of various formats up to 4K on my UHS Class 1 micro SD card but my new Samsung galaxy S9 is repeatedly telling me that there is something wrong with the card. It worked perfectly all the time back in my old S7. So, I purchased a new 128G card in case the other one is going bad. I was hoping to first copy everything to computer then copy to new card after formatting it in the phone.

    I have tried this all in 2 separate computers. I have a standard SD card adapter that I put the micro SD into then use the standard SD card slot on my laptops. I also have an external USB 3.0 card reader that has been tried.

    The problem I encounter:
    As soon as the transfer starts, The computer calculates the size and counts the 11,000 some files, then starts moving ~20MBps and fluctuates for a few seconds up and down from 10-20... then less than a minute in it drops to 0... and just stays there. I have left it for hours. I try going SD Card to SD Card using both adapters. I have run the CHKDSK via command prompt and used the check disk thru the tools tab on properties.
    Now I'm trying 3rd party tools to recover files but I think the one that is running now(and will be running for the next day) is only identifying deleted files and copying them to my hard drive.

    Please help me if you can advise any way I can get this simple copy/paste function working. Nowhere can I find info on a transfer than initializes, starts then just arbitrarily stops.

    Thanks so much
      My Computer


  8. Posts : 2
    Win10
       #8

    Gordon7 said:
    Try to shut down your AV (If running Defender, then also shut down Smart screen) ! When transfer files to/from USB/SD-cards
    AV's are often the cause of slow down!

    You can also try a very fast 3. party copy app. - : http://codesector.com/teracopy
    I have tried everything you all suggest on two different computers running win10. i am now attempting teracopy. once the copy paste operation starts, it's moving along at 20Mbps, then a few seconds in, it simply drops to zero and stops doing anything.
    I just cant get this data off my microSD card! it's a UHS class 1 card. i cant figure out what this issue is!
      My Computer


  9. Posts : 15,441
    Windows10
       #9

    jreynolds311 said:
    I have tried everything you all suggest on two different computers running win10. i am now attempting teracopy. once the copy paste operation starts, it's moving along at 20Mbps, then a few seconds in, it simply drops to zero and stops doing anything.
    I just cant get this data off my microSD card! it's a UHS class 1 card. i cant figure out what this issue is!
    Sounds like drive is failing.

    In the end copy data in smaller chunks e.g. 5GB at a time.
      My Computer


  10. Posts : 2,716
    Windows 10
       #10

    You have 11,000 files of various sizes. The large ones presumably video will be fastest, and the small ones a lot slower.
    I would try a small number of larger files first, working your way down in small batches. Maybe 10 max at a time or something to a HDD.
    Tedious for sure, but at least you should get something. Note difficult files and repeat for those.
      My Computer


 

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