My application has a backup/restore feature that writes a csv file to a directory named after the app, in the root of the sd card. I have a user trying to move from one tablet to another. The backup feature appears to properly be creating the backup file on her SD card. When she places the SD card in her new tablet, the backup file and the directory it's stored in do not appear to be on the SD card at all. Apparently she was successful in having other data from other apps move over.
I've walked her through everything I can think, including writing a test app to verify the issue. Without a doubt, the files exist on the old device, but don't exist when installed in the new device.
I'm unsure what the original device is, but the new device is a Dell Streak 7.
Anyone seen this before? I'm leaning towards corrupt SD card, but it seems it's my burden to prove as my app is the only app she's having issues with.
The root of /sdcard is not necesarrily the SDCARD you can remove and take out.
/sdcard is usually part of the build in memory which can be accessed and used by the user.
The SDCARD you can remove is usually found at /sdcard/external_sd on Android 2.2 devices and /sdcard/sd on Android 2.1 devices.
Yes the naming is a bit confusing .
Dark3n said:
The root of /sdcard is not necesarrily the SDCARD you can remove and take out.
/sdcard is usually part of the build in memory which can be accessed and used by the user.
The SDCARD you can remove is usually found at /sdcard/external_sd on Android 2.2 devices and /sdcard/sd on Android 2.1 devices.
Yes the naming is a bit confusing .
Click to expand...
Click to collapse
That would certainly explain some things, especially if a user is moving a SD card from one device to the next.
My app creates a folder under the path returned by the Environment.getExternalStorageDirectory() function, where it creates and reads a backup file.
My documentation asks users to connect their device to a computer, mount as USB, and copy the backup file into that directory. This user is simply moving the SD card between devices. I'm wondering if there is a better method than using the getExternalStorageDirectory that I can use, so that I can have a common location on all SD cards to facilitate users moving cards between devices.
wct097 said:
My documentation asks users to connect their device to a computer, mount as USB, and copy the backup file into that directory. This user is simply moving the SD card between devices. I'm wondering if there is a better method than using the getExternalStorageDirectory that I can use, so that I can have a common location on all SD cards to facilitate users moving cards between devices.
Click to expand...
Click to collapse
Well it depends on the device what happens if they mount as usb,
if they get the internal sdcard or the external sdcard or both.
On my galaxy i9000, both the internal(/sdcard/) and external (/sdcard/external_sd) are shown when pluging it into my computer and mounting it as usb.
Environment.getExternalStorageDirectory() will always return the path of the users storage enviroment which is in usually /sdcard . Thats fine so far.
The problem is there is no function to get the external storage (/sdcard/external_sd or /sdcard/sd).
The only option i know atm, would be to probe manually if such a directory exists. You can use Build.VERSION.SDK_INT to see which android the user has and check the right directory.
Build.VERSION.SDK_INT <= 7 would mean if he has plugged in an external sdcard it would be mounted under
Environment.getExternalStorageDirectory().getAbsolutePath() + "/sd/"
Build.VERSION.SDK_INT >=8 would be
Environment.getExternalStorageDirectory().getAbsolutePath() + "/external_sd/"
You could use that and maybe a "import backup" function to check for the file on an external sdcard?
Hi,
Just Got the 7.7 3g - so far so good. Screen is as good as they say
The extra resolution defn. helps with web browsing.
Not finding any lag really.
7.7 is just about the limit for my two handed use but i would say the original 7" was a wee bit easier to handle but something with time should become more intuitive.
Just a few issues - external sd card is somewhat limited. Might be deliberate by Samsung but does not make sense.
Normal user apps cant access to the external sdcard. Using connect bot, i checked permissions and it seems that it is mounted by the os with system permissions, where as the internal sdcard is mounted as sd_rw.
This can't be correct? The only way to copy stuff to it is to use the samsung system file explorer as it has system permissions So copy to internal first then to external - this sounds like a bug?
I have not rooted this yet - might then chown to sd_rw get rid of this ?? There is a lot of entries in the vold.fstab to make sense of. Not a hacker so just looking around. A bit too early to start soft-bricking
But I take these don't have protected bootloaders so thats why we can root ?
Video playback is v.good but I am not able to throw on a bluray m2ts file (obviously with the sd card issue) and play smoothly. I found Dice player can handle m2ts by renaming it to a ts file. It then can use hardware decoding. Still drops frames but still watchable to a certain degree. For all other files mx player is still best. I have lossy transcoded some "native" blurays clips and seems that it handle high profile h264 1080p at high bitrates very well. Hoping, formatting sd card ext3/ext4 will improve things.
On the whole very impressive device - plus more ics goodies to come soon hopefully.
I've noticed some issues with the external SD card as well. Only the stock file manager can copy files from the internal storage to the external storage. I was able to transfer files to the ext. SD via Dooblou's Wifi Explorer, though. Although that would crap out a few times.
I'm hoping that we see some new ROMs with a different file system at any rate. The 4GB limit is so 1998.
Fix for external sd write issue
I've already posted a fix for this in our original thread?
davp said:
There is a fix for the write to external storage in this thread:
Samsung Galaxy Tab Plus->Galaxy Tab Plus General->unable to write files to external sd card
post #7
Requires root to apply fix.
There is a new permission that older file managers aren't asking for yet. The stock file manager knows to ask for it.
Fix worked for my P6810 wifi.
Click to expand...
Click to collapse
thaloneus said:
I can't post a link to the original post on another forum that worked for me so I will quote it:
Simple solution for external sdcard write access on Android 3.2...if you're rooted
I've found a simple solution for gaining write access to the external sdcard (/mnt/sdcard2) on Android 3.2. The sdcard is mounted r/w, but the owning group is media_rw which is linked to the WRITE_MEDIA_STORAGE permission. Unfortunately, this permission was not required for access to the external sdcard prior to 3.2 so most file management utilities do not request it when they run...meaning they only have read access to the card.
The simple solution, if you're rooted, is as follows:
1. Using a root-enabled file manager, navigate to /system/etc/permissions and make sure you have mounted the file system r/w.
2. Edit platform.xml and find the WRITE_EXTERNAL_STORAGE permission.
3. Add an additional group definition for this permission...<group gid="media_rw" />
4. Save the changes to the file.
5. Restart your tablet.
After this change, any apps that request the WRITE_EXTERNAL_STORAGE permission (which includes almost anything that access either of the sdcards) will gain group membership in both sdcard_rw AND media_rw, giving them r/w access to both sdcard filesystems.
Click to expand...
Click to collapse
Rooted and then applied this change.
Can write to ext sdcard !!!!
Cheers
Will apply as soon as i get tad, should be getting it today, cant wait
Sent from my GT-P1000 using XDA App
I think you have to format the sd card in the tab. I been able to transfer files no problem. Maybe its due to the mtp for the internal sd.
Sent from my GT-P6800 using xda premium
will6316 said:
I think you have to format the sd card in the tab. I been able to transfer files no problem. Maybe its due to the mtp for the internal sd.
Sent from my GT-P6800 using xda premium
Click to expand...
Click to collapse
Using downloaded apps or the stock File Manager app? Because I formatted the SD card in the Tab and nothing else can write to it. Now, I can drag and drop stuff from my computer via MTP, but that's not the same issue.
Ok, I'm trying to add the permission and it doesn't seem to save after a reboot. I'm rooted and made sure to mount that directory as R/W. After I edit platform.xml and reboot it simply reverts. Can anyone offer a more granular description to this n00b?
Thanks.
Edit: Nevermind. I edited the file on my computer and copied it over the original and am good to go.
burhanistan said:
Ok, I'm trying to add the permission and it doesn't seem to save after a reboot. I'm rooted and made sure to mount that directory as R/W. After I edit platform.xml and reboot it simply reverts. Can anyone offer a more granular description to this n00b?
Thanks.
Edit: Nevermind. I edited the file on my computer and copied it over the original and am good to go.
Click to expand...
Click to collapse
Thanks Burhanistan. I had this problem too and did what you did to get around it. Now I can read/write to the external SD with any file explorer.
Hello,
I can access the external SD with no problem, only issue is Titanium backup showing 440Mb capacity on the external SD (32Gb card).
Anyone with the same issue? Any fix?
Thanks.
No problem for me
davp said:
I've already posted a fix for this in our original thread?
Click to expand...
Click to collapse
Things must have changed as i got my P6800 recently did the upgrade from samsung and tried to copy to external sd and no problem for me. I never tried to do it pre upgrade but maybe the upgrade fixed that. Re i can copy and paste to device from my pc when its connected - to both device and sd. I can also copy using the the stock file manager from device to sd card.
No Issues here also
I recieved the tap a week ago. Now my 32GB Sandisk SD is here.
The Tap did at the first startup and using the described 12 MB Android update via internet conn.
Until now there is no issue between writing from/to SD over PC/MTP, copying between internal and external SD. Used preinstalled Filemanager and ES File Ex.
I tried it unrooted and rooted but not before the Android update.
davp said:
Simple solution for external sdcard write access on Android 3.2...if you're rooted
I've found a simple solution for gaining write access to the external sdcard (/mnt/sdcard2) on Android 3.2. The sdcard is mounted r/w, but the owning group is media_rw which is linked to the WRITE_MEDIA_STORAGE permission. Unfortunately, this permission was not required for access to the external sdcard prior to 3.2 so most file management utilities do not request it when they run...meaning they only have read access to the card.
The simple solution, if you're rooted, is as follows:
1. Using a root-enabled file manager, navigate to /system/etc/permissions and make sure you have mounted the file system r/w.
2. Edit platform.xml and find the WRITE_EXTERNAL_STORAGE permission.
3. Add an additional group definition for this permission...<group gid="media_rw" />
4. Save the changes to the file.
5. Restart your tablet.
After this change, any apps that request the WRITE_EXTERNAL_STORAGE permission (which includes almost anything that access either of the sdcards) will gain group membership in both sdcard_rw AND media_rw, giving them r/w access to both sdcard filesystems.
Click to expand...
Click to collapse
Some people are reporting the above procedure is no more needed, however, with several apps (like Titanium backup, and a SAMBA explorer), writing to the sdcard (extstorage/.../sdcard) is still impossible (GT6800 updated to latest samsung firmware).
I have used this procedure and can state that Titanium backup works now with the SD card.
Thanks to many reading within the XDA forum, I have found this simpler procedure :
- download / install the "Root Browser Lite" app from the android market
- add write access to group and other to the following directory: /system, /system/etc, /system/etc/permissions (with root browser Lite, press on the directory name during 3 seconds to get a contextual menu allowing to change the permissions)
- add write access to group and other to the file platform.xml in /system/etc/permissions
- use the editor of "Root Browser Lite" to modify the file platform.xml as described above (you should have two <group gid= ...> lines within the WRITE_EXTERNAL_STORAGE xml block.)
- save the file. Verify that a .bak file has been created and that the date of platform.xml changed.
- remove the write access.
- Turn off the GTAB, then turn it ON.
NB: Titanium backup still reports a erronous free size on the SD card (401MB), but backups on the sdcard work.
can't save the xlm doc
davp said:
I've already posted a fix for this in our original thread?
Click to expand...
Click to collapse
Hi, I edit the file but when I try to save it I fail because it says original saved as .....xlm.bak, but I can't find that file and the one I find is unchanged, any ideas?
There is an automated installer for the fix here:
http://forum.xda-developers.com/showthread.php?p=21670802
Is for the plus but worked fine for me
Sent from my SCH-I815 using Tapatalk
damm, must forget something, just followed exacty all the steps
still no writing on sd card
the automatic installer failed also
IS there a way to go into the (forgive the incorrect term) "registry" or similar, and have Android re-interpret/understand that instead of looking in "/sdcard"... it should instead look/point programs to "/mnt/sdcard/extstorages/sdcard"...
i heard that it might be called something like a "simlink" or "symbolic link"... maybe this could resolve the application installation issue to the sdcard as well as backups, transfers, etc... right now, not only do i run out of space too fast, can't install apps to the sd card, but as well, if i should run a hard reset... all my data erases! (yes, the internal "SD card" is erased in a hard reset)...
so, for all practical senses, when it says it will erase data, unless you KNOW you have copied ALL you user data to your "Real" SD Card, you will kill your data without even knowing it when you do a hard reset, even if you "thought" you were protected because "I saved my info to the SD card!"
(and yes, this was my experience today, so it's a fact.)
backup programs won't point to the sd card, (app manager, titanium, app list backup, etc)...
so unless you actively move files individually to the card (and know where to look)...
Bottom line... is there a hack/workaround on this that's not just "open up for file transfers" or is someone working on a ROM that might kill the partitioning and allow the /sdcard to actually point to a real external card?
Edited: Nevermind...
acess-rights-hell
hi forum
i would like to use the EzyKernel v1 - 23/02/2012 as in post http://forum.xda-developers.com/showthread.php?t=1513413&highlight=ezykernel
one of the prerequisites is a stock ZSKL firmware.
on the tab is/was XXKL4 AUT/CH
i successfully flashed the ZSKL2 - but that's where the nightmare started: i could not write to sdcard, busybox/superuser don't work properly, as i can't get root via su - which means to me, that there are messed up accessrights also in other places, not just the SD. the funny thing is, that i finally got the overclocking EzyKernel working, but not busybox + superuser.
does that sound familiar to anyone ?
i would really appreciate any ideas about this.
thank you
with best regards from switzerland
roland
could you please explain what "make sure you have mounted the file system r/w" means. And sorry for my noob question, but does this fix allow to install apps on the external sd card or I'm missing something.
I slowly look there no longer. I have rooted my S3 Neo initially quite normal and provided with CWM as it has been explained in various tutorials. Then I fixed the Android 4.4 write access issue with the "NextApp SDFix" from Android market. With the "ES File Explorer" and "Total Commander" I could normally rename files on the SD card, copy and move.
However, to me the practical effect is associated with all apps, which store data automatically on the SD card very mysterious, because instead of the SD card, they will continue stored internally namely in "/storage/Emulated/0". I tested this with "Dead Trigger 2", which is usually stores the game data in "Android/OBB". In Application Manager I have the opportunity the app to move itself to the correct SD card (.android_secure directory), but just the app itself and not the game data wich stay in the internal, emulated SD-Card.
For my previous smartphone, an Ace 2 NFC (I8160P) there was a fix for it to fit the "vold.fstab" to file: http://forum.xda-developers.com/showthread.php?p=28419837#post28419837
I could find only a tutorial changing the internal memory with the real SD-Card for the normal S3, which, however, is probably not compatible with the S3 Neo: http://android-hilfe.digidip.net/visit?url=http://forum.xda-developers.com/showthread.php?t=2036796 - Or should I try it so anyway?
At first the question: Why the Kitkat-Fix is at all useful, if it does not help in practice and the data continues to be stored internally? The only thing that has been directly accessed files to the correct SD card was the photo app but that's about it.
Update: I just see that it also provides an Android folder on the right SD card as well as in the emulated and actually reside in folders and the installed apps, including "Dead Trigger 2". However, the folder unlike emulated SD card are completely empty. What does that have to mean again?
I hope somebody can help me ans find a solution as I can't use my external SD-Card for most game datas or apps as planned or I will send back my S3 Neo tomorrow.
PLEASE!!! Can somebody help me???
do you use xposed? there are a couple of modules that allows you to use obb files from sdcard. Personally i use "xinternal". those ps apps never worked for me also.
Use Folder Mount
I use a xposed module called "HandleExternalStorage" and it works like a charm! Try it yourself!
Good luck
Hi Everyone,
Back with an android phone after quite a while.
Just added a sd card to my SGS7E and realised I can't do anything with it.
All I want is to be able to use the sd card as you would normally, create and move files, folders etc.
Is this possible without rooting?
If so could someone provide any advice or point me to a relevant resource.
If i need to root what would you good people recommend? I don't want to do anything fancy at the moment (I'm sure that'll change) just use the card as normal storage.
Thank you for your help, advice and time.
The SD issues are my biggest let down. My camera won't save to it... people tell me to factory reset but I don't feel like loosing all my work I put into it.
Other apps see it as having storage in mb I think instead of GB. issues and nobody talks about it
Hi,
The sdcard is working okay for me. If system apps can't read or modify the content inside the sdcard, then reinsert the card or reformat it because it's very likely that the phone isn't seeing it.
If you want user installed apps to access the sdcard, it's a bit more annoying. Open the app that you want to access the card, then try to make a modification in it (like creating a new file if a file manager, saving a picture if a camera, downloading a file if a torrent client, etc), it will say it can't access the sdcard and will ask you to point where to root of the sdcard is, just select your sdcard folder on the prompt and it will work fine.
Keep in mind some stuff like app data can't be moved to the sdcard, so try to keep all media on your sdcard and all apps in your internal memory, that's what I found to be a pretty easy and good memory management. If you want however to install apps on your sdcard, you can enable adoptable storage using a terminal window (formatting your card), or root your device to use some third party app that will do that for you.
All the best,
~Lord
Sent from my Samsung Galaxy S7 Edge using XDA Labs
I'm having a rather unique problem with my the Micro SD card I installed.
I can format it as internal storage and it won't pop up for file managers or my computer.
This means I can't manually move files to it all.
Despite that when it's internal storage I can move apps to it and it adds new apps to it by default.
I could go to move all and move everything it can on, but it's a fairly slow SD card so I'm hoping to mainly put music, videos and any pictures on there.
I worry about it moving the apps that I want to keep in internal storage for speed over.
Does anyone know how I could fix this?
EDIT:
I didn't manage to figure out how to add files manually while it was internal storage through either internal file managers or through the computer.
But I did manage to find the SD card while it was portable.
The trick is to use the built in file explorer on the phone and copy a small file onto the SD card.
With there being something other than just Android files on the SD card it can then be discovered by the computer.
This mainly solves my problem as I plan to use it primarily for storage of music and game files, with the emulators being on the phone itself.
I had this issue a few days ago. You have 2 options to format, (1) as a internal storage and only your phone can read this and other option (2)to use on others devices. Using the second option I managed to transfer files to my microSD like it used to be.
While using the first option I was able only to transfer apps to it through the system.
I hope it helps
I'm using one, but I'm not even able to find it with File Manager?
Is that normal for Internal Storage?
I expected there to at least be a folder in the normal phone space called SD card or something?
Is there no way to manually move music there when it's internal storage?
Also I tried changing it to be portable but my computer still couldn't see it.
File manager could actually see it and open it but I couldn't copy paste anything to it.
So I turned it back to internal as I can at least move apps to it successfully at the moment.
Rajvir8 said:
I'm using one, but I'm not even able to find it with File Manager?
Is that normal for Internal Storage?
I expected there to at least be a folder in the normal phone space called SD card or something?
Is there no way to manually move music there when it's internal storage?
Also I tried changing it to be portable but my computer still couldn't see it.
File manager could actually see it and open it but I couldn't copy paste anything to it.
So I turned it back to internal as I can at least move apps to it successfully at the moment.
Click to expand...
Click to collapse
When I tried as Internal Storage any File Manager found my SDcard too... Thats why I'm using as portable.
After that, i could see this.
Maybe you're missing something like changing the USB connection from Charging to File transfering.
Did you checked this?
Yes it can see the rest of my phone and move files, so I've made sure to change it to file transferring.
When you used internal storage file managers failed to find your SD card as well?
dennismac said:
When I tried as Internal Storage any File Manager found my SDcard too... Thats why I'm using as portable.
Click to expand...
Click to collapse
Here your saying that you could find it and that's why you swapped over?
I assume you forgot to say it failed to show up separately and that's why you changed to portable.
Rajvir8 said:
Yes it can see the rest of my phone and move files, so I've made sure to change it to file transferring.
When you used internal storage file managers failed to find your SD card as well?
Here your saying that you could find it and that's why you swapped over?
I assume you forgot to say it failed to show up separately and that's why you changed to portable.
Click to expand...
Click to collapse
Sorry! Yes, I failed to find my SD card too, thats why i changed to portable.
Im assuming this is a normal behavior, my last Android phone was a Galaxy S2 and I stopped following Android changes for the lasts 4/5 years. But idk why you can't see it even in portable mode... That should work as worked for me.
Hope someone help you more than I did!
dennismac said:
Sorry! Yes, I failed to find my SD card too, thats why i changed to portable.
Im assuming this is a normal behavior, my last Android phone was a Galaxy S2 and I stopped following Android changes for the lasts 4/5 years. But idk why you can't see it even in portable mode... That should work as worked for me.
Hope someone help you more than I did!
Click to expand...
Click to collapse
Thank you for trying to help.
I think I might have figured out part of the problem, the file explorer I normally use doesn't have permission to add anything to the SD card. I'm not sure how I would go about giving it permission though.
But when I use the system built in I was able to copy paste some music onto it.
With a file on the SD Card my computer was able to locate it as well, and I can now copy and paste to the SD card using my computer.
So with your help I was able to figure out how to get portable working.
It is a bit disappointing that there isn't a way to manually add files while it is an internal storage though.
So again while your solution didn't directly work, it made me think and find a solution to my problem even if it's not the one I wanted.