[SOLVED] Can't write to external sdcard on kitkat, china android tablets

A lot of kitkat users complain of this problem, and some are yet to get a solution to it. In this tutorial, two methods will provided to assist with fixing the write-protecition issue embeded in the permission file.

I also faced this problem (not actually a problem though ;-) ) on my G-tide G-pad 6, but I was too busy to lookup a solution. But, here I am with one...(not one acually, but some :p ).

Requirements

1. A device with this fault (of course)
2. A file manager (X-plore recommended) ( Download )
3. Rooted device
4. And a brain

FIRST PROCEDURE (Manual method)

• Download and install X-plore, then run
• Go to Configuration

• Click on Root access  and select Superuser + mount writable

• Superuser access request should pop up, Allow it
• Now you're done here

• Go back now and Select Root directory
• Go to System > etc > permissions

• Locate the file platform.xml (Make a backup if you wish)
• Long press and select Edit text

• Search for 

<permission name="android.permission.WRITE_EXTERNAL_STORAGE"> 
<group gid="sdcard_r" />
<group gid="sdcard_rw" /> 
</permission> 

and replace with

<permission name="android.permission.WRITE_EXTERNAL_STORAGE"> 
<group gid="sdcard_r" />
<group gid="sdcard_rw" /> 
<group gid="media_rw" /> 
</permission>

• The only thing that's changed there is <group gid="media_rw" /> , so you can just add this beforre </permission> if you dont want to replace the entire text, (whichever is easy for you).
• Save the file, exit and reboot device
• Done!

SECOND PROCEDURE (App method) - Simple and less complicated.

• Download this app - SDFix

• Install and launch
• Follow the wizard
• Grant root access
• Reboot
• Done!