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How to fix a corrupted micro SD card without formatting it


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10 replies to this topic

#1 mamba2009

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Posted 05 September 2017 - 05:51 PM

Any advice please
I have a corrupted micro sd card, the files are still there but I can't open them. I think my android phone caught a virus through an app or a downloaded pdf file.
I've used command prompt on Windows, check disks and the mirco sd card showed raw drive then when I tried again it showed exfat32. I've used various software packages like    zar x, easeus, m3 raw recovery but no joy. When the software starts scanning, it gets half way then restarts the computer. I'm trying to recover the files without formatting it, It's frustrating because the files are there.
Windows command prompt and disk management tells me the partitions on the micro SD card are healthy and there are no problems.
Some people have advised me to use ubuntu to recover the files or to use TWRP Teamwin recovery, if so, can it be possible using ubuntu on virtual machine.

My phone is rooted, can I solve the problem without a P.C?

Any advice would be highly appreciated.


Edited by hamluis, 09 September 2017 - 08:10 AM.
Moved from External Hardware to Am I Infected - Hamluis.


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#2 Chris Cosgrove

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Posted 05 September 2017 - 06:06 PM

You don't need another computer. Use your existing one to download one of the many Linux ISOs which will happily create a 'live' installation disc. Ie, the version of Linux you choose will run in RAM, it will not install on your computer. Two that come to mind are 'Puppy' and 'Mint'. I have had a copy of Puppy on my desk for quite a while now, it's v525 dating to March 2013, and I have had success with Mint as a 'live' disc as well.

 

I suggest you take a look in the Linux section for details on how to create a bootable disc or USB drive. To make a USB bootable version use 'Rufus' by Akeo, a small utiility which only does one thing - it converts an ISO file into a bootable USB stick !

 

Once you have the Linux version of your choice in the format you want all you have to do is boot the computer with the media connected and it will boot from it. Then copy the files on this SD card to somewhere on the system hard drive so that you can work with them without doing any more damage to the original files. If the files are movable at all this should do it for you.

 

Chris Cosgrove



#3 saw101

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Posted 05 September 2017 - 06:08 PM

Also see this article: https://www.howtogeek.com/232931/how-to-recover-images-off-a-corrupted-sd-card/


I never make the same mistake twice....I always make it 5 or 6 times just to be sure!


#4 JohnC_21

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Posted 05 September 2017 - 06:12 PM

Download Testdisk for Windows. Unzip the file to folder on your desktop. In the folder is a program called PhotoRec. Do not run QPhotoRec as the recovery algorithm is not as robust as the command version. All recovery is in realtime and will be recovered to the folder you unzipped Testdisk to. The downside is all names recovered will be generic but will have the proper extensions. You will need to rename accordingly if they open.

 

You should never try to run chkdsk on a drive you are trying to recover from if the file system is corrupted.

 

PhotoRec step by Step

 

Note: If Windows freezes using PhotoRec for Windows there is a linux version in UBCD. I can give instructions on using PhotoRec in Parted Magic, part of UBCD if required.



#5 JohnC_21

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Posted 06 September 2017 - 02:12 PM

Responding to PM from OP:

"My android card was encrypted when I caught the virus/corruption
I decrypted the card so I can check it on my laptop, strange enough the decryption process didn't take long which was not normal as the card gb was very high.Can the card still be saved?"
 
If the drive has been decrypted you do not see your files? If encrypted run PhotoRec on the SD card and see if you can pull any files.

Edited by JohnC_21, 06 September 2017 - 02:13 PM.


#6 Chris Cosgrove

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Posted 06 September 2017 - 04:28 PM

 

You've recommended mint and puppy, will it work on ubuntu?
Are you saying I should install linux permanently as dual boot on my laptop with windows because it will not work on a virtual machine.
The other thing I forgot to mention
The micro SD card was encrypted on Android when it got corrupted so I decrypted it, the decrypt process was completed in a very short time, very strange as the gb was very high, I guess the decryption process was very quick due to the virus/corruption, can the card still be saved ?
Can I dual boot linux on windows when I'm using bitlocker encryption?
Thank you very much, much appreciated

 

I did not suggest creating a dual booting computer, I believe I said "A 'live' version of Linux which will run in RAM, it will not install on your computer" (added emphasis).

 

You could certainly run a 'live' version of Linux on a Windows computer which uses Bitlocker but I doubt that you would be able to overcome the encryption that way. When running Linux on a Windows computer one of the useful reasons for doing this is that Linux largely ignores Windows file permissions, it has its own. But it cannot ignore encryption.

 

If the card has been decrypted I would personally try Recuva, which has worked for me in the past. Otherwise go with JohnC's suggestion. Three or four years ago I had a Nikon which developed memory problems and ruined two 4GB cards. I discovered the problem in time to go back and re-shoot what was on one card and Recuva was able to restore the images from the other, I was lucky. The local camera specialist then informed me 'It is a known Nikon problem !'.

 

Chris Cosgrove



#7 mamba2009

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Posted 06 September 2017 - 07:01 PM

Thank you very much to John C and Chris Cosgrove, much appreciated for going out your way to message me back on numerous occasions with techniques on how to solve the problem.



#8 mamba2009

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Posted 08 September 2017 - 02:37 AM

I've used zar x, m3 raw recovery, recuva and photorec to retrieve my files from the corrupted micro sd card but still no joy.
When all the above recovery software programmes start scanning, it gets half way then a message comes up saying error, can't continue with the scanning, is this because my drives are encrypted with bitlocker, is it because my micro SD card was encrypted and I couldn't decrypt successfully or is it because the virus/corrupted sd card is not allowing the software to complete the task

#9 JohnC_21

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Posted 08 September 2017 - 07:25 AM

I would say it mostly likely the SD card, nothing to do with your drives having bitlocker. I think at this point your only option is to consult a professional data recovery service depending on how important the data is as the service is not cheap . One of the better ones is DriveSavers. You may have somebody local.

 

https://www.drivesaversdatarecovery.com/


Edited by JohnC_21, 08 September 2017 - 07:25 AM.


#10 mamba2009

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Posted 09 September 2017 - 07:49 AM

I used Recover my Files v5.2.1 software and these viruses showed up on the micro SD card. Can the above viruses be the problem on why my files don't open up. I also have the autorun.if virus. The $volumeduid virus has only affected two folders on the SD card. Should I delete the autorun.if and the $volumeduid viruses and if yes how? can deleting them affect the rest of my files. SD card was scanned using Smadav and Malware bytes but for some reason didn't show up. Does anyone know this virus and how it was passed on to my Micro SD card ? The data is extremely high on where the viruses are        data is 3,155,198.17TB


Edited by hamluis, 09 September 2017 - 07:59 AM.
Moved from External Hardware to Am I Infected - Hamluis.


#11 hamluis

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Posted 09 September 2017 - 09:23 AM

OP reposted in MRL without logs, moved to Am I Infected, https://www.bleepingcomputer.com/forums/t/656767/how-to-remove/ .

 

This topic is now closed to avoid confusion.

 

Louis






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