Hi, I have Android 4.0.3 (not rooted). The tablet has internal /mnt/sdcard all aplications and system use it as external sd. My tf card is also mounted as /mnt/extsd (I can access it) but apps like ireader, titanium backup never save or read from there. Now /mnt/sdcard is full but system does not install new apps to /mnt/extsd. How to use my extsd?