Do you get an error message? Does the save show after you save, but is gone after you restart the game? Or does no save appear when you try to save?
What system are you on? Windows?
Is the game on a USB stick, or write-protected folder?
Same here iam play on android device. When update cant find any old save data
dang, I'm sorry, can't tell u how many times I've gone into "Full Rage Recovery Mode" from my save data not staying there