More infos about the problem:
- at AndroidPolice.com: External Blues: Google Has Brought Big Changes To SD Cards In KitKat
- at XDA portal: Fix External Storage Handling with Xposed Module
- at sammobile.com: Android 4.3 on Galaxy S4 Google Edition breaks SD card writing for apps...
This app has no user interface. Enable it in Xposed - reboot - done.
What does this app?
It adds the group media_rw to WRITE_EXTERNAL_STORAGE. This is done at runtime, the file platform.xml itself will not be changed. So /system has to not be writable
Xposed needs root access for installation and requires Android 4.0.3 and up
Play Store: http://tinyurl.com/nnajr7f
Xposed Repository: http://tinyurl.com/ptgjr53
Why this app? Editing platform.xml and add media_rw to WRITE_EXTERNAL_STORAGE is boring.