[GUIDE] Internal Memory Data Recovery - Yes We Can!

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Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
This method does not seem to work on newer phones that apply TRIM or some other type of partition clearing implementation. If anyone has recovered their data on a device newer than Android 4.3 please pm me and let me know.

The Preamble
Did you delete all your SDCard data? :confused:
Are you pissed because no one told you before you unlocked your bootloader what would happen? :eek:
Did you lose valuable pictures of cats doing wondrously funny things? :laugh:
Well now there's a convenient new way for you to get that data back Buckaroo! :cowboy:

The Problem
Internal Memory doesn't mount as a drive like external memory does. External memory would allow you to use data recovery tools that scan for deleted files and return them to a usable state. These tools work because most operating systems don't go through and set all of those 1's and 0's to just 0's when you delete a file. Usually the operating system will just delete the reference pointer in the index that says that a file exists with such-and-such name and it's located at this position on the hard disk / memory location. There are destructive delete tools out there that will overwrite the spot of a deleted file multiple times to discourage recovery in just this manner. The issue is that data recovery tools need an actual mounted drive in order to dig deep and unearth those funny pictures of cats you so tragically deleted by accident. These newest batches of phones don't have external SDcards which are super easy to mount as drives. Internal memory mounts as MTP/PTP which is not treated as a mounted drive and cannot be scanned by these data recovery tools. But, cry no more cream-puff! :crying:

The Process
My phone is the Samsung Galaxy Nexus (toro) though I imagine this should work for ANY phone with Internal Memory. We will be using a Windows 7 machine to:
  • back up the entire internal memory partition to your computer as a single, massive .RAW file,
  • convert the .RAW file output to a VHD,
  • mount the VHD as a disk in Disk Manager,
  • scan the attached VHD volume for files that have been deleted and recover them,
  • ?
  • profit! :good:

The Requirements
  • A rooted Android phone, (try to root with a non-destructive method as this appears to protect those who must root from wiping the device data a second time),
  • BusyBox installed on your device,
  • Cygwin installed to [c:\cygwin] with pv and util-linux from the repo. Make sure to open Cygwin once to make sure that the /bin folder is created. Also, I made a folder at [c:\cygwin\nexus] to put the exported .RAW file,
  • Netcat (download the ZIP file and extract nc.exe to [c:\cygwin\bin]),
  • ADB (make sure adb.exe is in your path),
  • USB Debugging enabled on your device,
  • VHD tool from the mighty M$. Put the VhdTool.exe file in [c:\cygwin\nexus],
  • Piriform Recuva or your favorite data recovery tool, (it appears Recuva only finds the more common file types like images, videos, etc. Those were the file types in which I was interested. If you are after more exotic file types perhaps you might share the software you used.)
  • A calm sense of peace and serenity that you will get your files back... :fingers-crossed:

The Work
  1. *****Based on the number of people having trouble with this step it is now my recommendation that you choose to recover your entire memory block instead of just the data partition. In my phone's case that is mmcblk0. Please discover if yours is different.***** Identify which block/partition you want to recover. For our purpose here we are seeking to recover the userdata partition: /dev/block/mmcblk0p12
  2. Turn on your phone
  3. Connect the phone in ADB mode
  4. Unlock the screen.
  5. Open a Cygwin terminal and enter (This assumes your BusyBox installation is at [/system/bin/busybox]. It may be at [/system/xbin/busybox]):
    Code:
    adb forward tcp:5555 tcp:5555
    adb shell
    /system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12
  6. Open another Cygwin terminal and enter:
    Code:
    adb forward tcp:5555 tcp:5555
    cd /nexus
    nc 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw
  7. Run around the house a few times. For 32GB internal memory this is going to take 3+ hours. That's a lot of running. When it's done...
  8. We need to convert the .RAW file to a virtual hard drive. VhdTool.exe basically just puts a VHD footer on the end of the .RAW file. Open a Windows command prompt, go to [c:\cygwin\nexus], and type:
    Code:
    VhdTool.exe /convert mmcblk0p12.raw
  9. Now we need to mount the VHD in Windows. Select the Start button-->right-click Computer-->select Manage.
  10. Select Storage-->Disk Management.
  11. In the menu select Action-->Attach VHD.
  12. For Location enter [c:\cygwin\nexus\mmcblk0p12.raw] and select the OK button.
  13. Right-click on the name (e.g. "Disk 1") to the left of the Unallocated space and select Initialize Disk.
  14. Select the GPT (GUID Partition Table) radio button and select the OK button.
  15. Right-click on the Unallocated space and select New Simple Volume...
  16. In the Wizard select Next>, leave the default for the volume size, select Next>, select a drive letter (e.g. K), select Next>, MAKE SURE to select the 'Do not format this volume' radio button, select Next>, select Finish.
  17. A box will pop up asking you to format the drive. You DO NOT want to format the drive at this time.
  18. Right-click on the RAW space and select Format... MAKE SURE to change the File system to FAT32. Set the Allocation unit size dropdown to 'Default.' MAKE SURE that the Perform a quick format checkbox is CHECKED. You do not want to overwrite the entire new drive with all zeroes (0's) and destroy your data. Quick Format means that it will only attempt to destroy the index for the drive by establishing a new index. Without this box checked the Windows operating system will write zeroes (0's) across the entire volume, potentially destroying your data. Select the OK button.
  19. A box will pop up saying that Formatting this volume will erase all data on it. That would be doubly true if you actually didn't check the 'Perform a quick format' checkbox. Double check that you actually did check the box and select the OK button. (Don't worry. This essentially leaves the volume in the exact same state that your phone's internal memory is living in right now: there is data on the drive...you just can't see it. It's coming back, I promise!)
  20. Open the Piriform Recuva application. In the wizard select the 'Next >' button. Select the 'Other' radio button and select Next >. Select the 'In a specific location' radio button and enter: k:\ (assuming K is the drive letter you chose...) Select the Next > button. Select the Enable Deep Scan checkbox. This is the magical setting that finds files that have been deleted...but not really deleted. Select the Start button.
  21. The application may take about an hour to do the 'Deep Scan.' It's time for more laps around the house! Once the application has returned its results you can choose which files to recover using the checkboxes. Select the 'Recover...' button and choose the location to which you wish to output your files.
  22. ?
  23. Profit! :victory:

The Appendix
The following links helped me to create this modern marvel - mad props to scandiun! :

Good luck!
 
Last edited:

scandiun

Senior Member
Jul 12, 2010
1,863
961
I forgot to mention, but run commands inside android as superuser or may fail (just after adb shell):

Code:
adb forward tcp:5555 tcp:5555
adb shell
[B]su[/B]
/system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12

And greetings for the guide, I didn't know of VHD Tool, congratulations!.
 
Great Work

I forgot to mention, but run commands inside android as superuser or may fail (just after adb shell):

Code:
adb forward tcp:5555 tcp:5555
adb shell
[B]su[/B]
/system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12

And greetings for the guide, I didn't know of VHD Tool, congratulations!.

Good and informative tutorial indeed. Thanks though.
 

Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
Good point...

I forgot to mention, but run commands inside android as superuser or may fail (just after adb shell):

Code:
adb forward tcp:5555 tcp:5555
adb shell
[B]su[/B]
/system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12

And greetings for the guide, I didn't know of VHD Tool, congratulations!.

Thank you again scandiun :)

You may be right about the superuser command: su

For my part I did not have to use it but I'm sure it wouldn't hurt to run as su. Some systems may actually need it though.
 

Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
Here's hoping...

Good and informative tutorial indeed. Thanks though.

Thank you oliverpowell :)

I just hope the people who need this actually find it before they give up and start overwriting their lost data. Even having to get root access may cause a certain amount of data loss for some. Thankfully I was already rooted and already had busybox....
 

marhensa

Senior Member
Dec 17, 2010
2,017
1,174
Bogor
YOU..
YES YOU....!!!!!
WHERE HAVE YOU BEEN ALL MY LIFE? :(

s*it mate, i wish this thread comes earlier...
i lost my precious files on sdcard about 3 months ago when unlocking bootloader.

um..
anyway do you have any idea how to make files from computer back to internal memory,
but without changing the date modified timestamp?

i'm using adb push for that, but that's painfuly slow..
while mtp transfer messed up the date modified.

thanks, bookmarked.
just in case i do something stupid next time.. :D
 
Last edited:

Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
Not many options...

um..
anyway do you have any idea how to make files from computer back to internal memory,
but without changing the date modified timestamp?

i'm using adb push for that, but that's painfuly slow..
while mtp transfer messed up the date modified.

I'm afraid painfully slow is probably the only option, just like my step that takes three hours. Start it and go build a birdhouse or window box for flowers....it's going to take a while.
I'm sorry you lost files. It's very sad to hear some of the stories of people losing pictures of their children's birth, or the last pictures of their husband going to Afghanistan... and not returning. :(

I'm hoping that this approach or one like it can be made popular. It needs to get out there.
 

xda_toronto

Member
Nov 19, 2012
5
0
Thanks for this tutorial. :good: It worked as indicated. I just wish I knew earlier as I had been trying for the past few days to use recovery tools and trying to make the internal drive USB Mass Storage capable when all this time there was this tutorial. Unfortunately, it only returned a dozen photos. Thanks again for this tutorial... this should be spread across xda forums for any others running into these issues.
 

Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
Thanks again for this tutorial... this should be spread across xda forums for any others running into these issues.

Agreed - lol

Firstly, I only recently created this guide. I'm sorry you lost files :(

Secondly, I attempted to link to older threads that mention the same issue so that they would be more likely to show up in a future Google search but I was scolded for waking up old threads, which makes sense. I just thought this was a rather seriously important issue that deserves a lot of eyes. Loss of personal photos is a little more significant than troubleshooting a bad ROM flash, IMO. But the Mod correctly canceled those other posts. It is a little douchey to try to increase a post count by linking all over to a single (my first, really) post. However, I couldn't give less of a pbbbttt about post counts. If you don't mind me asking, how did you find this thread?

Lastly, if you add it to your sig then this will show up on all of your posts...just sayin'...

I'm glad it at least helped you get 12 pics back...
 

Med1a

Member
Oct 11, 2011
19
6
Oklahoma City
Proplem

Sir .. I'm facing problem .. it won't receive any data from 5555 port .. I tried to make it copy the RAW file but it stopped without getting any data .. is that normal ?? see the picture attached

gnex.jpg
 

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CADude

Senior Member
Nov 29, 2011
913
632
I have a question. Let's say we don't want somebody to ever use this guide to recover our stuff after we sell them a phone. What's the most secure and thorough way to destroy all data on the Gnex, making it impossible to recover, short of destroying the phone?
 

Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
A couple things from you screenshots...

Sir .. I'm facing problem .. it won't receive any data from 5555 port .. I tried to make it copy the RAW file but it stopped without getting any data .. is that normal ??

Did you try without using su command? Also where is busybox installed? /system/bin or /system/xbin?
 

efrant

Senior Moderator / Developers Relations
Staff member
Feb 12, 2009
11,468
10,981
Montreal
I have a question. Let's say we don't want somebody to ever use this guide to recover our stuff after we sell them a phone. What's the most secure and thorough way to destroy all data on the Gnex, making it impossible to recover, short of destroying the phone?
If you use the erase command in fastboot, it should work (i.e., "fastboot erase userdata"), otherwise, flashing the stock userdata image will do the trick (i.e., "fastboot flash userdata userdata.img") <-- this writes a blank image in the userdata partition.
 
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Wartickler

Senior Member
Nov 4, 2009
170
353
Tallahassee, FL
...well, that's a good question!

I have a question. Let's say we don't want somebody to ever use this guide to recover our stuff after we sell them a phone. What's the most secure and thorough way to destroy all data on the Gnex, making it impossible to recover, short of destroying the phone?

I would imagine you could do this guide, use a Guttman algorithm wipe utility on the attached VHD and then figure out a way to push the entire VHD back to the phone. Unfortunately, that may not actually overlay the physical phone memory in the same way. Perhaps you could wipe the VHD again and push it again, and then again...?

I want to say that someone asked the question on scandiun's post too. Go see if they figured out how to push back to the phone.

Good luck :)
 

scandiun

Senior Member
Jul 12, 2010
1,863
961
Sir .. I'm facing problem .. it won't receive any data from 5555 port .. I tried to make it copy the RAW file but it stopped without getting any data .. is that normal ?? see the picture attached

gnex.jpg
busy box installed properly in the right directory

su command used


When running su check on phone that permissions are granted. Furthermore using absolute paths is for when you are running it from clockworkmod recovery. If the phone is powered on you can use

Code:
adb forward tcp:5555 tcp:5555
adb shell
su
nc -l -p 5555 -e dd if=/dev/block/mmcblk0p12
Open another Cygwin terminal and enter:
Code:
adb forward tcp:5555 tcp:5555
cd /nexus
nc 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw

If you are still having problems you can try the command within the phone only and see if dd works:
Code:
adb shell
su
dd if=/dev/block/mmcblk0p10 of=/dev/null

Also, make sure you run all the commands in the two terminals each time and in the proper order, if you are not sure cancel with Control+C and close them and restart again.

For those who want to try backing up the partition via wifi, you can send it via ftp. Read this post:
http://forum.xda-developers.com/showthread.php?p=27793062#post27793062
 
Last edited:

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  • 306
    This method does not seem to work on newer phones that apply TRIM or some other type of partition clearing implementation. If anyone has recovered their data on a device newer than Android 4.3 please pm me and let me know.

    The Preamble
    Did you delete all your SDCard data? :confused:
    Are you pissed because no one told you before you unlocked your bootloader what would happen? :eek:
    Did you lose valuable pictures of cats doing wondrously funny things? :laugh:
    Well now there's a convenient new way for you to get that data back Buckaroo! :cowboy:

    The Problem
    Internal Memory doesn't mount as a drive like external memory does. External memory would allow you to use data recovery tools that scan for deleted files and return them to a usable state. These tools work because most operating systems don't go through and set all of those 1's and 0's to just 0's when you delete a file. Usually the operating system will just delete the reference pointer in the index that says that a file exists with such-and-such name and it's located at this position on the hard disk / memory location. There are destructive delete tools out there that will overwrite the spot of a deleted file multiple times to discourage recovery in just this manner. The issue is that data recovery tools need an actual mounted drive in order to dig deep and unearth those funny pictures of cats you so tragically deleted by accident. These newest batches of phones don't have external SDcards which are super easy to mount as drives. Internal memory mounts as MTP/PTP which is not treated as a mounted drive and cannot be scanned by these data recovery tools. But, cry no more cream-puff! :crying:

    The Process
    My phone is the Samsung Galaxy Nexus (toro) though I imagine this should work for ANY phone with Internal Memory. We will be using a Windows 7 machine to:
    • back up the entire internal memory partition to your computer as a single, massive .RAW file,
    • convert the .RAW file output to a VHD,
    • mount the VHD as a disk in Disk Manager,
    • scan the attached VHD volume for files that have been deleted and recover them,
    • ?
    • profit! :good:

    The Requirements
    • A rooted Android phone, (try to root with a non-destructive method as this appears to protect those who must root from wiping the device data a second time),
    • BusyBox installed on your device,
    • Cygwin installed to [c:\cygwin] with pv and util-linux from the repo. Make sure to open Cygwin once to make sure that the /bin folder is created. Also, I made a folder at [c:\cygwin\nexus] to put the exported .RAW file,
    • Netcat (download the ZIP file and extract nc.exe to [c:\cygwin\bin]),
    • ADB (make sure adb.exe is in your path),
    • USB Debugging enabled on your device,
    • VHD tool from the mighty M$. Put the VhdTool.exe file in [c:\cygwin\nexus],
    • Piriform Recuva or your favorite data recovery tool, (it appears Recuva only finds the more common file types like images, videos, etc. Those were the file types in which I was interested. If you are after more exotic file types perhaps you might share the software you used.)
    • A calm sense of peace and serenity that you will get your files back... :fingers-crossed:

    The Work
    1. *****Based on the number of people having trouble with this step it is now my recommendation that you choose to recover your entire memory block instead of just the data partition. In my phone's case that is mmcblk0. Please discover if yours is different.***** Identify which block/partition you want to recover. For our purpose here we are seeking to recover the userdata partition: /dev/block/mmcblk0p12
    2. Turn on your phone
    3. Connect the phone in ADB mode
    4. Unlock the screen.
    5. Open a Cygwin terminal and enter (This assumes your BusyBox installation is at [/system/bin/busybox]. It may be at [/system/xbin/busybox]):
      Code:
      adb forward tcp:5555 tcp:5555
      adb shell
      /system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12
    6. Open another Cygwin terminal and enter:
      Code:
      adb forward tcp:5555 tcp:5555
      cd /nexus
      nc 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw
    7. Run around the house a few times. For 32GB internal memory this is going to take 3+ hours. That's a lot of running. When it's done...
    8. We need to convert the .RAW file to a virtual hard drive. VhdTool.exe basically just puts a VHD footer on the end of the .RAW file. Open a Windows command prompt, go to [c:\cygwin\nexus], and type:
      Code:
      VhdTool.exe /convert mmcblk0p12.raw
    9. Now we need to mount the VHD in Windows. Select the Start button-->right-click Computer-->select Manage.
    10. Select Storage-->Disk Management.
    11. In the menu select Action-->Attach VHD.
    12. For Location enter [c:\cygwin\nexus\mmcblk0p12.raw] and select the OK button.
    13. Right-click on the name (e.g. "Disk 1") to the left of the Unallocated space and select Initialize Disk.
    14. Select the GPT (GUID Partition Table) radio button and select the OK button.
    15. Right-click on the Unallocated space and select New Simple Volume...
    16. In the Wizard select Next>, leave the default for the volume size, select Next>, select a drive letter (e.g. K), select Next>, MAKE SURE to select the 'Do not format this volume' radio button, select Next>, select Finish.
    17. A box will pop up asking you to format the drive. You DO NOT want to format the drive at this time.
    18. Right-click on the RAW space and select Format... MAKE SURE to change the File system to FAT32. Set the Allocation unit size dropdown to 'Default.' MAKE SURE that the Perform a quick format checkbox is CHECKED. You do not want to overwrite the entire new drive with all zeroes (0's) and destroy your data. Quick Format means that it will only attempt to destroy the index for the drive by establishing a new index. Without this box checked the Windows operating system will write zeroes (0's) across the entire volume, potentially destroying your data. Select the OK button.
    19. A box will pop up saying that Formatting this volume will erase all data on it. That would be doubly true if you actually didn't check the 'Perform a quick format' checkbox. Double check that you actually did check the box and select the OK button. (Don't worry. This essentially leaves the volume in the exact same state that your phone's internal memory is living in right now: there is data on the drive...you just can't see it. It's coming back, I promise!)
    20. Open the Piriform Recuva application. In the wizard select the 'Next >' button. Select the 'Other' radio button and select Next >. Select the 'In a specific location' radio button and enter: k:\ (assuming K is the drive letter you chose...) Select the Next > button. Select the Enable Deep Scan checkbox. This is the magical setting that finds files that have been deleted...but not really deleted. Select the Start button.
    21. The application may take about an hour to do the 'Deep Scan.' It's time for more laps around the house! Once the application has returned its results you can choose which files to recover using the checkboxes. Select the 'Recover...' button and choose the location to which you wish to output your files.
    22. ?
    23. Profit! :victory:

    The Appendix
    The following links helped me to create this modern marvel - mad props to scandiun! :

    Good luck!
    31
    I forgot to mention, but run commands inside android as superuser or may fail (just after adb shell):

    Code:
    adb forward tcp:5555 tcp:5555
    adb shell
    [B]su[/B]
    /system/bin/busybox nc -l -p 5555 -e /system/bin/busybox dd if=/dev/block/mmcblk0p12

    And greetings for the guide, I didn't know of VHD Tool, congratulations!.
    22
    VHD tool download

    For people who are unable to get hands on VHD tool,

    Exe: https://www.mediafire.com/?f96bmsvjz4qdvbu

    Same thing in zip: https://www.mediafire.com/?f96bmsvjz4qdvbu

    Regards
    15
    Success! Thanks to everybody! :)

    After reading some posts I want to resume in one reply users contribution like advices or notes including my own contribution about "0 byte issue", "cygwin 64 bits vs 32 bits" and other issues of this topic.

    1) Remember that could be important DO NOT use the phone neither Internet neither app which could WRITE at inner memory. The less use, the better.

    2) Remember the possibility to download directly the APK playstore applications from your computer as busybox using an APK downloader instead of downloading directly from your device to prevent write on the inner memory.

    Therefore transfer the APK using USB cable to the external SD card to prevent write data to the inner memory.

    3) Remember that you could have busybox installed in bin, xbin or other folder applying these commands following the steps

    4) Check if ADB shell and busybox have "allow access" in the SuperSU at your phone
    5) Check if the phone is screen blocked with PIN. You need to unblocked it to allow connection between computer and your device
    6) Remember to ACCEPT the RSA fingerprint appear as a popup window on your device when you init the connection using ADB. If this does not appears try to move between USB modes as UTP and PTP till some event trigger it.
    7) It seems NO communication using nc command on cygwin64. Use ncat.exe instead.

    NOTE about "Cygwin 32 bit, instead of the 64 bit" issue: it is not mandatory to install cygwin (32 bits). Using ncat.exe (32 bits) instead of nc at cygwin 64 bits goes on.

    How to install ncat.exe into cygwin64:

    a) Download nmap-6.46-win32.zip from nmap website. Nmap contains ncat.exe application for Windows
    b) Open and extract ZIP file into a temp folder
    c) Copy ncat.exe, libeay32.dll and ssleay32.dll to the C:\cygwin64\bin folder (Assumed you installed cygwin in that path)
    d) Restart cygwin64 terminal to have the changes on.

    Then, change nc to ncat in this step:

    $nc 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw
    $ncat 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw

    8) It is not necessary to log as root inside cygwin. Only run cygwin as Windows Administrator.
    9) Remember to have ADB access at PATH environment var to allow cygwin execute Windows ADB without issues
    10) Remember to use su and absolute paths at first shell.
    $adb shell su /system/xbin/busybox nc -l -p 5555 -e /system/xbin/busybox dd if=/dev/block/mmcblk0p12

    if it shows the error "can't open permission denied" this means that the device is blocked. See steps 4), 5) and 6)

    11) You will obtain something like that after dump all data from inner memory to the raw file. It is necessary to complete with a non error process:
    ##### gywin first shell ###############

    [email protected]
    $ adb shell su /system/xbin/busybox nc -l -p 5555 -e /system/xbin/busybox dd if=/dev/block/mmcblk0p12
    24182784+0 records in
    24182784+0 records out

    12381585408 bytes (11.5GB) copied, 2836.886444 seconds, 4.2MB/s
    ###############################

    ##### gywin second shell ############

    $ ncat 127.0.0.1 5555 | pv -i 0.5 > mmcblk0p12.raw
    close: No error [4,21MiB/s] [ <=> ]
    11,5GiB 0:47:17 [4,16MiB/s] [ <=>

    ###############################

    12) Remember to rename mmcblk0p12.raw to mmcblk0p12.vhd AFTER applying vhdtool /convert. Better for recognize VHD files on Windows Disk Management.
    13) AFTER Initialize Disk it is not mandatory create any volume neither quick format the disk although for piriform recuva could be necessary. However some other software as PhotoRec or Diskinternals Partition Recovery are able to READ the Initialized disk and unallocated space to recover files directly. The less manipulation on the VHD, the better.

    14) Remember that the recover utilities have file type defined. But, how about if you want to recover a special file type? In PhotoRec you can define custom file extension to be recovered. More info at cgsecurity.org.

    15) Keep calm and enjoy the process!

    _______________________
    #Computer
    Computer OS Windows 7 64 bits
    CPU Intel Core 2 Duo [email protected]

    #Device
    Model GT-I9300
    Android 4.3
    Baseband I9300XXUGNA8
    Kernel 3.0.31-2429075
    [email protected] #1
    Thu Jan 16 23:47:54 KST 2014
    Build JSS15J.I9300XXUGNA5

    Rooted CF-Auto-Root-m0-m0xx-gti9300.zip
    SuperSU 1.93
    Busybox 1.22.1
    13
    alright. I think I found the solution for the 0 Byte issue.
    I tried everything now and it finally worked.
    The culprit for me was the whole 64 bit thing. Just go 32bit. (Only thing that is 64 bit on my setup is JDK 8 right now.)

    I also want to note that I am on Windows 8 Pro (64bit)

    I quickly want to summarize the important steps where a lot of people seem to make mistakes or oversee something:

    1) get Cygwin 32 bit and NOT 64 bit
    http://cygwin.com/install.html ->> setup x86.exe

    Install it. when Installing click next until you get to the packages window. See screenshot for that . Scroll down to Utils
    add the packages pv and util-linux (by clicking on skip and checking both boxes)
    then complete your installation.

    you should now have a bin folder now.

    2) go grab the adb (adt bundle) from google.
    unzip it and copy the whole content from \adt-bundle-windows-x86_64-20140321\sdk\platform-tools
    to your C:\cygwin\bin folder

    3) grab netcat zip from http://www.daemon.de/Netcat
    and follow their instructions. its only the nc file (nc.exe to be precise) that you want to copy to your cygwin\bin folder

    thats basically it. these are the most important steps where you could have made mistakes.
    for me personally the 64 bit was the only culprit. Everything works fine with the 32 bit cygwin for me. but the 64 bit one still says 0 Bytes.. so scr*w it :)

    also if you want to know your partition, you might have different values like I do. mine was
    Code:
    su
    ls -l/dev/block/platform/dw_mmc/by-name/

    to get your own value type

    Code:
    su
    cd /dev/block/platform/
    ls
    it should output a folder name . the value that you are looking for .

    Code:
    ls -l/dev/block/platform/(ENTER_THE_VALUE_THAT_WAS_OUTPUTTED_BY_THE_LS_CMD_BEFORE)/by-name/

    And that should show you which names are assigned to which patitions (system, user ,data etc)


    And last but not least. I am just an average guy with few skills but I try to punch myself through stuff by learning and trying to do my best.
    I am not trying to brag or convince anybody and I know that there are nerds who might want to bash me. I dont care. I had the 0 byte problem myself and read through the forums and the problem was never really solved.
    Now that I solved it for myself I could ve left without sharing my success in solving this problem (for my case at least but I hope its a general one)
    But I took my time to share it with the guys in need.

    I hope it will help you and many of you have precious data that needs to be restored. I would be happy if I can contribute something to save your pics from family etc and other cases that were mentioned a few times in this thread.

    Also Thanks to the Topic Starter , but I dont recommend the recovery software that he recommend. I'd go for testdisk / photorec personally.
    There was another software that was recommended somewhere in this thread . you might want to test that one maybe if testdisk is too hard for you.

    one last request: I think my post is going to be long. so PLEASE dont quote all of it if you answer :D
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