Develop Bugs

How to fix the "0" folder?

Hi I flashed CM 10.1 with twrp, but was created the "0" folder in my sd card. Somebody know how can I fix this problem?
Sent from my Galaxy Nexus using xda app-developers app

Googling helps when trying to find answers...
There are a lot of guides on how to "fix" this. If done CORRECTLY you will have only one 0 folder. You also need to update your recovery to the latest version.
Sent from my Galaxy Nexus using Tapatalk 2

If you are not going to give meaningful help, perhaps it would be better not to say anything.
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Altaman said:
If you are not going to give meaningful help, perhaps it would be better not to say anything.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
The irony.
OP. It's a 4.2 thing. Not a problem. Use the search in the future there are dozens of threads about this.

Altaman said:
If you are not going to give meaningful help, perhaps it would be better not to say anything.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
Give a man a fish and he'll eat for a day. Teach a man to fish...
Sent from my Nexus 7 using Tapatalk 2

Altaman said:
If you are not going to give meaningful help, perhaps it would be better not to say anything.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
I DID help you.
I WAS going to leave it at the Google part. However, I left it up to you do your own work instead of spoon feeding you.
Sent from my Galaxy Nexus using Tapatalk 2

this isn't a problem as such, this is just a new feature in 4.2.1. so if you create another users a folder called 1 will be created and so on, this is just the user-space of that particular user.

use TWRP recovery

darkshot said:
Hi I flashed CM 10.1 with twrp, but was created the "0" folder in my sd card. Somebody know how can I fix this problem?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Like the others said it's not necessary an error.
It would be an error if you flash another ROM and you end up with "Emulated/0/0" folder struckture.

For 4.2 roms, Install CWM recovery 6.0.2.3
Backups made after the instilation will be in data/media/clockworkmod.
To see the backup when you usb connect to a computer, you need to move the backup to data/media/0/clockworkmod.
The data/media/0 folder would have already been generated and is your new SD card directory.
CMW now has .tar back ups set as default. This means no more blobs folder and a complete backup is made.
You can select to save using the blobs folder method if you prefer.
So keep in mind if you have a backup using the blobs method that you want to restore, you may have to restore it before installing the latest version of cwm or switch between the .tar and dup methods (untried by me)
D3VIOUS runs a clockworkmod revovery thread on the development section, read the last 3-4 pages and your pretty much set.

darkshot said:
Hi I flashed CM 10.1 with twrp, but was created the "0" folder in my sd card. Somebody know how can I fix this problem?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
it isnt a "problem" the sdcard format changed in 4.2 due to the multi-user feature being added.. now you have 2 choices
1. flash the latest twrp and you will only have that one "0" folder
2. use the guide linked in my sig to revert back to the old sdcard format and get rid of the "0" folder

Android 4.2.x File Structure Thread

Hey Guys,
So After all of the recent questions and concerns I have seen and answered, I have decided to make a thread to help users understand the new file structure of android 4.2.x. I hope this will help those of you with questions and concerns and make for a smoother transition from 4.1.x and touch wiz roms.
I will break this into three categories........
First I will explain what the file system is and why it is present and how it affects you......
Second is if you haven't yet but are planning on making the jump to 4.2.x.
Third will be if you have already made the jump without doing your homework. (For those of you wondering where your files are, wondering why your sd card was formatted, or cant find your recovery backups..... This section is for you!!)
Section 1.)
What is the new file system and what the hell is this /0 folder?
With Android 4.2, Google introduced multiple users as a new feature. In order to accommodate multiple users, Google is now giving each user their own folder for storage. What happens is 4.2 uses an emulator to make different users and uses the /0 folder as the default users storage on the sd card. It doesn't recognize anything on the root of the sd card only whats in /0. To support multi-user capabilities this will be the norm... for each user, there will be a sequentially numbered folder in /data/media (/data/media/0, /data/media/1)...
And for each user, within Android, this will be symlinked to /sdcard & /storage/sdcard0... for user 1, /sdcard = /storage/sdcard0 = /data/media/0... for user 2, /sdcard = /storage/sdcard0 = /data/media/0...
These are emulated storage points... /data/media/0 = /storage/emulated/0, /data/media/1 = /storage/emulated/1
Without root access, each user will just see /sdcard/ and will not be able to access the other emulated storage points...
In the recovery mode, however, /sdcard is mapped to /data/media which is why you need to navigate to the "0" folder to see your files!
So in order to access your internal storage files they will be in data/media/0. So for example to access the backup location In titanium backup after you flash navigate to data/media/0/TitaniumBackup. (Thanks to ktetreault)
That being said, If you already flashed a 4.2 rom without preparation, your files aren't lost they are just inaccessible they are just not in the proper place for 4.2 to see them.
So now that we have all the technical stuff out of the way...... Lets get into how to either prevent or fix this issue.
Section 2.)
Preparing to flash a 4.2 rom from a touch wiz rom or an aosp 4.1.x based rom.
Okay, so you have touch wiz or aosp 4.1.x of some sort and your ready to try out the goodness of 4.2?
First backup your ext sd card to your pc or if a pc is unavailable (and your willing to take a risk) use a file explorer on your phone such as Es file explorer from the market to transfer the contents of the ext sd card to your internal sd card. I highly suggest avoiding using the phone as some hiccups can occur. I have done it successfully myself but have heard others who have lost their files during transfer because they left the app while it was transferring. If you do use this method DO NOT LEAVE THE APP UNTIL THE FILE TRANSFER IS COMPLETE.
Second Format your ext sd card so we have a clean slate to work with as this will help tremendously to avoid any headaches.
Third Install the latest recovery of your choice. The reason for this is that the older recoveries are not updated for 4.2 and will continuously create a new /0 folder every time you flash a new rom. Follow the instructions to install in the applicable thread.
Thanks to naddict for posting the links.... These are all flashable zips thru recovery
TWRP 2.4.1.0 - http://d-h.st/9cL
CWM 6.0.2.3 - http://d-h.st/jbT
CWM Touch 6.0.2.3 - http://d-h.st/8A9
Fourth Flash the 4.2 rom of your choosing per the instructions of the developers OP in their thread.
Set your phone up as usual and then restore the files from your backup on your pc or move them back from the internal sd card using es file explorer again. Keep in mind that the /0 folder is your new sd card storage. Now you are good to go and enjoy the new features and benefits of 4.2 and not have to search for your files :good:
Section 3.)
Okay so you got overly excited and flashed a 4.2 rom........ OMG!!! All my files are gone!!!! I can't restore any backups and all my precious files have disappeared!! Why was my sd card formatted?????
Relax.... Your files didn't go any where they are exactly how you left them you just can't see them.....
I will walk you thru 4 easy steps to get your files back and put you back on track.
First Make sure you have the latest recovery of your choice. If needed refer to the links posted in section 1. If you don't do this you will see a duplicate /0 folder created every time you flash a new 4.2 rom.
Second You won't be able to find your backups thru recovery. The easiest method I found is to download any touch wiz rom. Wipe your phone completely and then flash the touch wiz rom you downloaded. Reboot and go thru the setup and what not.
Third Now install es file explorer or the app of your choice. Next copy everything from the root of the sd card into the /0 folder that 4.2 had created oh so nicely for you.
Fourth Reboot into recovery and re-flash the 4.2 rom you began with. After going thru the initial rom setup you will see that are of your files are back intact and ready for you to access.
Hopefully this has helped those of you with questions and concerns about upgrading to 4.2.x. If i missed anything please feel free to let me know and ill include it here or address any further questions.
Thanks to:
Sundawg of TBD
Koush Of CWM
Team Win
And All of the devs on xda
Hope I have helped if so feel free to press thanks!!

Thank you for taking the time to write this. This should help a lot of people.
Sent from my SGH-T999 using Tapatalk 2

WhoWhere said:
Thank you for taking the time to write this. This should help a lot of people.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
No problem. I was answering this a few times recently and I know I was baffled at first. As well I didn't see any other threads regarding this so I figured it may help.
Sent from my SGH-T999 using Tapatalk 2

If i am currently on a 4.1 ROM and don't have an external sd(i only have the internal storage), will the new 4.2 file system affect me when i flash a 4.2 ROM?
So far i have backed up apps+data with titanium backup, and im ready to flash liquid smooth ROM using twrp. I just want to know if after flashing my internal storage contents will still be there and i will be able to restore apps with tb.

Outstanding guide, good work!
Sent from my SGH-T999 using xda premium

This should help a lot of people, nice work! I will add this to the FAQ.

chromium96 said:
If i am currently on a 4.1 ROM and don't have an external sd(i only have the internal storage), will the new 4.2 file system affect me when i flash a 4.2 ROM?
So far i have backed up apps+data with titanium backup, and im ready to flash liquid smooth ROM using twrp. I just want to know if after flashing my internal storage contents will still be there and i will be able to restore apps with tb.
Click to expand...
Click to collapse
No you shouldn't be affected bud I would only suggest getting an sd card just to backup anything important in case of a freak error during flashing or accidental wiping of internal sd.
Sent from my SGH-T999 using Tapatalk 2

Towle said:
This should help a lot of people, nice work! I will add this to the FAQ.
Click to expand...
Click to collapse
Thanks i appreciate you including it in your thread.
Thetenthdr said:
Outstanding guide, good work!
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
Thanks a lot took me a little while to get it all together.
Sent from my SGH-T999 using Tapatalk 2

chromium96 said:
If i am currently on a 4.1 ROM and don't have an external sd(i only have the internal storage), will the new 4.2 file system affect me when i flash a 4.2 ROM?
So far i have backed up apps+data with titanium backup, and im ready to flash liquid smooth ROM using twrp. I just want to know if after flashing my internal storage contents will still be there and i will be able to restore apps with tb.
Click to expand...
Click to collapse
Yes, but you will have to set the backup location In titanium backup after you flash to data/media/0/TitaniumBackup
Sent from my SGH-T999 using xda premium

ktetreault14 said:
Yes, but you will have to set the backup location In titanium backup after you flash to data/media/0/TitaniumBackup
Sent from my SGH-T999 using xda premium
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Click to collapse
Thanks for informing I'll add that to the op as well.
Sent from my SGH-T999 using Tapatalk 2

this was of great help
When I went to 4.2.1 I did not understand the file system change. I had to use my backup phone for 5 days before I finally got my SMSand MMS and Launcher Pro restored.
Then I wiped and flashed again and it created a new "0" directory. I have been afraid to do anything but dirty flash since.
This finally explains it all and I feel confident in wiping again.
Thank you so much.

GeneLM said:
When I went to 4.2.1 I did not understand the file system change. I had to use my backup phone for 5 days before I finally got my SMSand MMS and Launcher Pro restored.
Then I wiped and flashed again and it created a new "0" directory. I have been afraid to do anything but dirty flash since.
This finally explains it all and I feel confident in wiping again.
Thank you so much.
Click to expand...
Click to collapse
No problem bud that's why I created the thread to help everyone understand and to give you guys a place to ask.
Sent from my SGH-T999 using Tapatalk 2

You rock, thx for the info, looks like it was a lot of work but good idea after so many posts asking about the same thing

lordazoroth said:
You rock, thx for the info, looks like it was a lot of work but good idea after so many posts asking about the same thing
Click to expand...
Click to collapse
No problem it was my pleasure. Hopefully will cut the redundancy lol
Sent from my SGH-T999 using Tapatalk 2

If you are missing your /sdcard/download/ file:
Go to: /mnt/shell/emulated/download/
+Bound for Valhalla!

Valhalla_ said:
If you are missing your /sdcard/download/ file:
Go to: /mnt/shell/emulated/download/
+Bound for Valhalla!
Click to expand...
Click to collapse
Yup that will work but quite an annoying work around Lol that's why I showed you guys how to prevent this or fix it so this won't be needed every time you need a file
Sent from my SGH-T999 using Tapatalk 2

Great work, very informative and easy to read...
Sent from my SGH-T999 using xda premium

unk2009 said:
Great work, very informative and easy to read...
Sent from my SGH-T999 using xda premium
Click to expand...
Click to collapse
Hey, quick question, I bounced off another ROM onto liquidsmooth without updating my recovery and ended up with an extra '0' folder, can I move my files out of there and delete it safely?

lordazoroth said:
Hey, quick question, I bounced off another ROM onto liquidsmooth without updating my recovery and ended up with an extra '0' folder, can I move my files out of there and delete it safely?
Click to expand...
Click to collapse
Yup no problem just delete the innermost one without your files and you will be good to go.
Sent from my SGH-T999 using Tapatalk 2

rawdaddymagraden said:
Yup no problem just delete the innermost one without your files and you will be good to go.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
Pimp, thx a bunch!

Phone storage when flashing roms

Okay this is weird lol..I tried searching and couldn't find anything. .for instance when I flash to aosp then flash back to a tw rom...the phone storage seems to be on a separate partition and it's empty none of my original files are present. ..if I go to file manager in twrp I can see my files but back in tw it's like a fresh storage with nothing lol...I can flash back to aosp and backup my crap then format internal storage and data then move the stuff back but that's a headache. Any how to stop that from doing this to my storage when flashing from aosp to tw? It must be a Samsung thing because it also does this on my friends s3...the past I've had htc phones and never have had this slight headache. Sorry for rambling. .but I'd greatly appreciate the feedback. Thank you
Galaxy Note 2

What AOSP ROM did you flash and what Android version it is?
Sent from my SPH-L710 using xda premium

mar.ioo said:
What AOSP ROM did you flash and what Android version it is?
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
It's done that with cm10.1 and ptmr3's aosp rom both 4.2.2
Galaxy Note 2

mrjaydee82 said:
It's done that with cm10.1 and ptmr3's aosp rom both 4.2.2
Galaxy Note 2
Click to expand...
Click to collapse
Its because Android 4.2.x support multiusers, once you flash a 4.2.x ROM you will now have a storage called /0 rather than /sdcard thats the default storage location. You can switch between /0 and /sdcard by moving all the data and deleting unnecessary files using you computer or ES File Explorer.
When switching from 4.2.x to 4.1.x move the files with ES File Explorer. In ES File Explorer go to Settings>Root Settings and tick the first three options. Them being Root Explorer, Up to root and Mount file system. You can find the actual TW storage in mnt/shell/emulated once you enabled the options in root settings.
Kinda hard at first but you'll get the hang of it No other workaround.
Edit: Another thing... In 4.2.x you wont see your pictures if they are in the /sdcard. You will have to move them to the 4.2.x storage /0
In my case when I switch to TW (rarely), i only move my TWRP folder.
Sent from my SPH-L710 using xda premium

Thank you..that makes sense
Galaxy Note 2

mrjaydee82 said:
Thank you..that makes sense
Galaxy Note 2
Click to expand...
Click to collapse
You're most welcome! Here if any other help needed
Sent from my SPH-L710 using xda premium

there is a simple workaround..
Just flash the attached file any time you downgrade from a 4.2.2 AOSP to a TW rom, and this fix takes care of all of that for you automatically..
Flash this after you flash the TW rom, but, before you reboot....

When I go back to tw there is a file 0 in my internal with empty copies of all of my internal files, I just delete the whole thing, reboot, and everything is back.

9wire said:
When I go back to tw there is a file 0 in my internal with empty copies of all of my internal files, I just delete the whole thing, reboot, and everything is back.
Click to expand...
Click to collapse
Please my friend, read! It just a couple of post above yours.
Its because Android 4.2.x support multiusers, once you flash a 4.2.x ROM you will now have a storage called /0 rather than /sdcard thats the default storage location. You can switch between /0 and /sdcard by moving all the data and deleting unnecessary files using you computer or ES File Explorer.
Click to expand...
Click to collapse
Sent from my SPH-L710 using xda premium

mar.ioo said:
Its because Android 4.2.x support multiusers, once you flash a 4.2.x ROM you will now have a storage called /0 rather than /sdcard thats the default storage location. You can switch between /0 and /sdcard by moving all the data and deleting unnecessary files using you computer or ES File Explorer.
When switching from 4.2.x to 4.1.x move the files with ES File Explorer. In ES File Explorer go to Settings>Root Settings and tick the first three options. Them being Root Explorer, Up to root and Mount file system. You can find the actual TW storage in mnt/shell/emulated once you enabled the options in root settings.
Kinda hard at first but you'll get the hang of it No other workaround.
Edit: Another thing... In 4.2.x you wont see your pictures if they are in the /sdcard. You will have to move them to the 4.2.x storage /0
In my case when I switch to TW (rarely), i only move my TWRP folder.
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Thank You
I just experienced this exact same issue and was confused. I just went from SOA 4.2.2 to JediXP 12 to give TW a go again for a while

bigystyle84 said:
Thank You
I just experienced this exact same issue and was confused. I just went from SOA 4.2.2 to JediXP 12 to give TW a go again for a while
Click to expand...
Click to collapse
You're welcome bud! if you flashed a 4.2.x ROM just to see how it was and switched back to TW you can just delete the /0 storage as it probably wont have any files, just empy folders.
Sent from my SPH-L710 using xda premium

wase4711 said:
there is a simple workaround..
Just flash the attached file any time you downgrade from a 4.2.2 AOSP to a TW rom, and this fix takes care of all of that for you automatically..
Flash this after you flash the TW rom, but, before you reboot....
Click to expand...
Click to collapse
Ooooh awesome. ..ill try this next...tyvm
Galaxy Note 2

Where are my files?

Hello,
I was on Hyperdrive rom, love it, and all my files were there far as Photos, Wallpaper, etc... when I load other roms they are there, but recently I updated my boot loader and now I don't see none of my files. Its like they system got wiped. But when I go to recovery to load another rom I see all my files in the directory, even my rom zip files.
When I pick either "illusions" or "MIUI" I don't see none of my files. Could it be the boot loader that I installed? Do I have load every single photo, wallpaper, and music again? won't it be duplicates if I do?
I'm going to install the "Hyperdrive" rom again, but it gets tiring loading all the apps from the market. But I'll do it just to see if I get the photos and etc....

Google xda android 4.2.2 sdcard /0 folders
This has been pretty thoroughly covered. You just hsve to know what to look for!
Sent from my SGH-T999L using xda premium

DocHoliday77 said:
Google xda android 4.2.2 sdcard /0 folders
This has been pretty thoroughly covered. You just hsve to know what to look for!
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
I go to root explorer and still see nothing. There is no folder in explorer that says "0" I go to my sdcard and still nothing.

What rom are you on?
Sent from my SGH-T999 using xda premium

johnny quest said:
I go to root explorer and still see nothing. There is no folder in explorer that says "0" I go to my sdcard and still nothing.
Click to expand...
Click to collapse
Don't go to /sdcard. Go to /data/media. Then you'll see everything.

Ok, thanks. I'll look for it on there. I was on "illusion" then "miui" rom but I just gave up and switched over to "hyperdrive" there I can see all my files. But I will try again with the other roms.

Here is the thread that Doc was talking about.
Android 4.2.x File Structure Thread
If you go back and forth between 4.1.2 and 4.2.x you will have issues like this.

Woody said:
Here is the thread that Doc was talking about.
Android 4.2.x File Structure Thread
If you go back and forth between 4.1.2 and 4.2.x you will have issues like this.
Click to expand...
Click to collapse
thank you very much. So my best bet is to just stay with 4.2.2 once I make that leap from 4.1.2? I posted a comment on that thread regarding the transfer of files. I just want to be clear. I went back to 4.1.2 and so I'm basically transferring all my files to the "0" directory? You see I have a Mac so I have to have Airdroid, but I can get a HP laptop. So, I transfer all my files then format my ext sd card, then transfer my files back in the "0" directory and that's it? along with my 4.2.2 roms. then do the whole wiping thing to install a new rom?

If you do this before flashing 4.2.2 ypu msy end up with something like this /0/0/
I've seen where some have had 8 or more zero directories! Youll have to read more on that though as I don't know a lot about it.
Sent from my SGH-T999L using xda premium

(Q) Going from TW 4.1.2 to any 4.2.2

Is there anything special I gotta know? I'm am experienced flasher but haven't put cm on my s3 and now I wanna step it up but don't wanna lose any data and I read somewhere that the file system is different so that when going to 4.2.2 you basically reset everything on your phone? Thanks for the help!
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Nothing special flashing 4.2.2, just make sure your bootloaders are updated. Usually, your old files on your internal will be moved to a folder, usually labeled 0 or legacy. It should be located in the mnt or storage folders. I usually just use es file explorer to search for a file from my old internal files. Happy flashing

Right on ty and I'm on dlk3 but is that newest or is dlk4? Also how easy is it to go back to a TW 4.1.2?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

dlk3 is the newest for AT&T. DLK4 is for other models. If you got your phone with dlk3 or updated through ota or kies, your bootloaders should be fine.