UE4.22 cannot find save file location in distribution build

My app is totally working fine and is able to read and write data to the save file, the only problem being that I have trouble locating the save file on my mobile device. When using UE4.20 distribution build I was able to locate my save file on mobile device under internal storage , seems like UE4.22 change the location or it is store in some other ways.
Please help me out if anyone know how to solve this issue. Thanks in advance!