If your Android version is 11 and higher:
Using your file manager, copy your backup folder (the backup folder name may vary according to your package name, such as com.whatsapp, com.aero, or com.aerolla) located in Android 》media folder to another folder.
After copying to another folder, if the folder name is "com.aero" or "com.aerolla", change the folder name to "com.whatsapp".
Make sure that the folder you copied your backup folder into will not be deleted.
You can check your package name by navigating to Aero Privileges 》About page.