1. First run your file manager and go to:
"ROOT/data/data/com.square_enix.android_googleplay.FFIV_GP/files/"
2. Delete "save.bin"(If theres no such file the go to step 3).
3. Minimize your file manager then run the game and select a new game. Go to the point where you are with Kain and can access the map.
4. Minimize the game and switch to your file manager and copy "save.bin" from SDCard to "ROOT/data/data/com.square_enix.android_googleplay.FFIV_GP/files/" and overwrite the exisiting file.
5. Set the permission of save.bin to "rw- rw- r--" or like this
X X 0
X X 0
X 0 0
X = check
0 = uncheck
6. Switch to your game again and go to menu>save>title menu
7. Load your game using slot 1(Do not select continue!)
8. Enjoy a brand new [HARD MODE] game (normal would be too easy plus achievements)