I was having all sorts of troubles figuring out how to allow apps write to the sd card and found various posts that I compiled to give your apps write access after the 4.3 update.
To fix SD card access on google edition s4
4.3 android
install google usb driver
https://developer.android.com/sdk/win-usb.html
root device ? taken from post below
[GT-I9505] CF-Auto-Root - xda-developers
Download and unzip
CF-Root Download
- If you end up with a*recovery.img*and*cache.img*file, you've extracted*twice. You need to end up with a*.tar.md5*file - don't extract that one
- (USB) Disconnect your phone from your computer
- Start*Odin3-vX.X.exe
- Click the PDA button, and select*CF-Auto-Root-....tar.md5
- Put your phone in*download*mode (turn off phone, then hold*VolDown+Home+Power*to boot - if it asks you to press a button to continue, press the listed button, or run*adb reboot download*command)
- (USB) Connect the phone to your computer
- Make sure*Repartition*is*NOT*checked
- Click the*Start*button
- Wait for Android to boot
- Done (if it took you more than 30 seconds, you need practise!)
Once you have things rooted you can go into the superuser app and from within it there is a remove option, use that and reinstall from the play store and also pay for the pro version to support being able to do this.
* optional after you are all rooted and updated you can install things like goomanager and from goomanager you can install openrecovery script from the menu options, this will install a new recovery manager so future use
install root explorer app or some other file manager that can use root then
1. 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 device
at this point you should be able to write to the sd card from applications once again.