This tutorial is for all xperia SP (C530X) with FW 12.0.A.1.254 Locked or unlocked bootloader ( ROOT Needed)
First you need this app Root External 2 Internal SD <- click for install from play store (it's free)
next yo need open the app.
once open, you need change some configuration, click go to open settings.
click in the Original internal mounting point and change for /storage/sdcard0
click in the Original external mounting point and change for /storage/sdcard1
click in the ext sdcard device access and change for /dev/block/vold/179:33
click in Mount Options and change for fmask=0702,dmask=0702
and finaly check the option "use per default"
reboot and enjoy, i have an 32GB micro SD card class 10
remember mark "At boot" for swap on every reboot
For all who use init.d leave this script, just uncompress and placed in /system/etc/init.d directory, correct permissions and restart.
Note: If use the script, not use the program or vice versa.
Int2Ext.sh (see attachments)