Hello, I have been trying to find an answer to my problem for a long time, but nothing seems to work. I have already checked - UseExternalFilesDrir for UE4 game files but same results 
In this Reddit post I wrote you will find photos and videos what I mean: / I would really appreciate any help. If you have any questions or need more screenshots let me know. Thanks 
You need to - > SetProjectFilePath to ProjectPersistentDownloadDir in your gameinstance OnInit event ;
Hope it helps… for me it works because I was solving this three monts ago
You need to - > SetProjectFilePath function with inputparameter GetProjectPersistentDownloadDir in your gameinstance OnInit event ;
Hope it helps… for me it works because I was solving this three monts ago, now its live and saves are working
check my game
https://play.google.com/store/apps/details?id=com.SupersonicSnailStudio.TinyToonyZombies
Hello, I did what you said but my game doesn´t save any data. However only save data if I upload the game to the play store, then when I download the game the data is saved (it´s really weird). With other previous game I had the same problem. Only the data is saved when the game is upload to the play store and you download it from google. I attach an image for me this doesn´t work if I want to test the game before upload to the google play store (setting the project file path as you can see on the image).