✔ 最佳答案
Fact:
you may notice that the document size remain the same through out the whole game, it seems that the save file is not readable only but also connected to other files to work the result data out. For example, The "option.sav" changes when you save.
Even if you are able to read the data out from a old save, the save is no longer workable, which means that your game will crash if you try to save on that old save file. But situation will return to normal if you overwrite that save slot with a new save.
Solution:
It is notable that you should not extract only the save0.dat file or whatever number corresponding to the save slot. Instead you should copy the whole "Document" file located in the Zenonia4 app directory. so I'm sorry for your situation that not able to recover the original file.
Confirmed transfer tool: winSCP, iFunBox, iExplorer
Confirmed iOS: 5.0, 5.0.1
Confirmed Jailbroken iOS: 5.0.1
iDevice: iPhone4