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Writing to external SD guide

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By vauxhallastra, Senior Member on 11th February 2012, 02:45 PM
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Not sure if this has been covered already on the 7.7 forum, but it's a very useful guide.
This makes Titanium backup and other apps able to write to the external SD card.

Quoted from Thaloneus post on the 7+ forum.


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.



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14th February 2012, 03:57 PM |#2  
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Copy or use mine at your own risk
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File Type: zip platform.xml.zip - [Click for QR Code] (2.1 KB, 911 views)
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6th March 2012, 04:33 AM |#3  
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Has anyone else tried this? Don't wanna make a mistake.

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6th March 2012, 06:17 AM |#4  
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Worke flawlessly! Thank you!!!

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6th March 2012, 06:42 AM |#5  
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how did you use it ?
just copy/paste ?
6th March 2012, 09:53 PM |#6  
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Used root explorer in rw mode, copy & paste to

/etc/permissions/platform.xml

If you're using vauxhallastra's, don't forget to unzip it first.

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7th March 2012, 10:37 AM |#7  
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thx

did copy/paste , but.. i'm still not able to move apps to the external sd card
must forget something

followed the steps, tab is root
must be one of those days :(
7th March 2012, 07:53 PM |#8  
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I used root explorer in RW mode. Did you do this as well as unzip the file.

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7th March 2012, 11:15 PM |#9  
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great!!works flawlessly

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8th March 2012, 12:35 PM |#10  
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OK, so I have done this and all seems to be working. However, someone above mentions moving apps to the card, can someone explain how that should be done?
9th March 2012, 11:43 AM |#11  
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Quote:
Originally Posted by palexr

OK, so I have done this and all seems to be working. However, someone above mentions moving apps to the card, can someone explain how that should be done?

This can be done for instance with Titanium Backup. Tested and works.
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