How do I restore the local save backup file for World War Z: Aftermath?

If your in-game progression was deleted, you can try to restore it by using your local save backup. 
Note: This method won't work if the data was lost after you have reinstalled your OS.

• Go to %LOCALAPPDATA%\Saber\WWZ\client\storage\ folder.
• You should see the slots folder, which consists of your backup save files.
• Copy user_profile.dat, user_progression.dat, user_firearms.dat, user_challenges.dat, user_loadouts.dat (each file contains respective data) from one of the folders in slots to ...storage*profile* where *profile* consists of random letters and numbers (like 8f6c79c53f204e38bd...).
• When launching the game, choose Local Data if the launcher asks you which data to use.