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  1. Thread Author  Thread Author    #1  
    UJ95x's Avatar

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    Default [GUIDE] Using chkdsk to fix a corrupted SD card

    While Google has removed support for SD cards since the release of ICS, some OEMs (namely Samsung) have gone against that and continue to include an SD slot for expandable storage. This is a good thing for many reasons; users can store pictures, movies, music, contacts and/or documents on here and not have to worry about their internal storage being taken up.

    Unfortunately, this also leaves room for problems with the SD card, most notably with corruption of the content stored on the cards. Many apps and programs claim to be able to retrieve corrupted information but for the most part, don't help much and require that you have the program set up before any corruption happens.
    While I don't guarantee that this guide will help you retrieve any personal information, you might be lucky and at least save some of what was lost, and prevent any more corruption from happening. I have used chkdsk before and was able to retrieve several pictures and a couple hundred songs

    Now before we get started, you'll need a couple of things; the corrupted SD card, and a computer running Windows. (I'm using Windows 7 for this demonstration)

    Ok, ready? Let's start
    First off, you'll need to go to the start menu on the bottom left of your computer screen
    Click on that and there will be a search bar. Type in the word "cmd" and hit enter
    You should see something named "cmd. exe" under a list of programs
    Right click that and hit "Run as Administrator" as is shown below
    [GUIDE] Using chkdsk to fix a corrupted SD card-admin.jpg

    This will open a command windows that will allow you to do a plethora of things, but most importantly, fix our SD card
    The window will look something like this:
    [GUIDE] Using chkdsk to fix a corrupted SD card-cmd.png

    Now before you insert the SD card, make sure the card isn't write protected as this will prevent the program from having access to the card
    This is only if you are using an SD card adapter for your micro SD. If your desktop/laptop have a microSD slot, you do not need to do this


    Look at your SD card, on the side there will be a "switch." Make sure it is as far up as it can go (The letters on the card should be readable, not upside down)
    Once you have checked for this, you can insert the card into your PC's card slot
    Doing this will open a window on your PC, showing the name of the card and asking if you want to open it or transfer any files to and from the card. Close out of the window
    Now go back to the start menu and open "My Computer." There will be a list labeled "Devices with removable storage" under which you will find your SD card and the drive letter. You'll need the letter for when we use the chkdsk command.
    [GUIDE] Using chkdsk to fix a corrupted SD card-rd-h.jpg

    In my case, the SD card has the driver letter "H:"
    Your letter may be different, so make sure that you type in your specific one.

    Now you will go back to the command window and type in "chkdsk" then your card's drive letter, followed by a colon and /f
    It should now look something like this:
    [GUIDE] Using chkdsk to fix a corrupted SD card-untitled.png

    After this is typed in, hit enter and wait for the program to go to work and find then fix any corruption on the card. This can take a few minutes, depending on the amount of corruption and on the storage size of the card
    When it is done, you should see this in your command window:
    [GUIDE] Using chkdsk to fix a corrupted SD card-chkdsk.png

    In this example I have no corruption, so the wait time was very short and I didn't get any reports of data being retrieved or fixed.
    Cards with corrupted data will get any recovered data stored in the directory lost.dir in the SD card's list of folders
    Now we're all done
    Hopefully this helped out some of you with the recovery of any info and/or with preventing any further corruption.
    I also recommend reformatting the SD card once you use it again as it will do so in the appropriate format for your specific device.
    Last edited by UJ95x; 02-06-2014 at 11:50 AM.
    Everything in this post is 100% accurate...I think

    R.I.P. Motorola...and what could have been the best smartphone line ever
  2. #2  
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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    Awesome! Going to bookmark this for future reference.

    Sent from my Nexus 5 using AC Forums mobile app
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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    Outstanding write up! Thanks.

    Devices: Current: Nexus 5, Moto X, Galaxy Tab 2 (7.0); Retired: Galaxy S2 (Epic 4G Touch); Traded: Galaxy S3
    When I let go of what I am, I become what I might be - Lao Tzu
    Community Guidelines and also here
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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    Very nice! I may want to try this on a card I have.

    Would this technically work if I copy corrupt files from my computer onto the card? (I had the SD card itself hold the corrupt files after they got ruined on the card from the phone. I then copied those corrupt files onto my computer so I could have them just in case I can retrieve them.)

    If your want a reference, I have a thread about my issue I've had with SD card corruption here:
    Galaxy S4: Micro SD Card Corruption Issues

    Thank you again!

    Sent from my SPH-L720 using Tapatalk
  5. Thread Author  Thread Author    #5  
    UJ95x's Avatar

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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    Quote Originally Posted by KevroniCoal View Post
    Very nice! I may want to try this on a card I have.

    Would this technically work if I copy corrupt files from my computer onto the card? (I had the SD card itself hold the corrupt files after they got ruined on the card from the phone. I then copied those corrupt files onto my computer so I could have them just in case I can retrieve them.)

    If your want a reference, I have a thread about my issue I've had with SD card corruption here:
    Galaxy S4: Micro SD Card Corruption Issues

    Thank you again!

    Sent from my SPH-L720 using Tapatalk
    You can try that. It's not a sure fix but always worth a try

    Sent from my Galaxy S4 running SlimKat 4.4.2
    Everything in this post is 100% accurate...I think

    R.I.P. Motorola...and what could have been the best smartphone line ever
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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    i did what you asked... but there's a difference what is in the screenshots that you have.. mine asked some yes or no question about turning my folder into files something like that... then it finished but when i insterted it to my phone it didnt read it it only says blank sd card.. when i tried it again the y/n questions were gone it was just like your but still my phone doesnt read it but my computer does...
  7. Thread Author  Thread Author    #7  
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    Default Re: [GUIDE] Using chkdsk to fix a corrupted SD card

    Quote Originally Posted by jayjay sevilla View Post
    i did what you asked... but there's a difference what is in the screenshots that you have.. mine asked some yes or no question about turning my folder into files something like that... then it finished but when i insterted it to my phone it didnt read it it only says blank sd card.. when i tried it again the y/n questions were gone it was just like your but still my phone doesnt read it but my computer does...
    Sorry for the late reply. Do you remember what the question was asking, exactly?
    If your card is now blank, you might want to format it inside of the phone. Your PC might have reset it into a non-supported format for your phone.

    Sent from my Galaxy S4 running SlimKat 4.4.2
    Everything in this post is 100% accurate...I think

    R.I.P. Motorola...and what could have been the best smartphone line ever

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