What is the best strategy for keeping android devices "synched" (Solved)

[improviser]

Greetings all. I have finally figured out how to back up my iReal Pro program and save the backup file to Google drive. I have 2 PCs running Bluestacks and 1 Android phone running the Android app. When I make a change or addition in one of these, I would like to make the others reflect the changes.

If I make a change in one program, then create a backup file, and load that into Google drive, I am not quite sure what happens when I import that file into another device instance of iReal Pro. Does this file OVERWRITE the data that is running in the second program or simply add to it? I ask this question because when I tried this, it appeared that the playlists were doubled on the new machine rather than just updated.

There must be many users who want to do this. Can anyone help me with the mechanics of a makimg all version "synced". I know I cannot do it directly and must work with uploading and downloading backup files.

Thanks for your help!