What is an ab file and how do I open an ab file?
AB is a backup file created by ADB, or Android Debug Bridge, a command-line tool included with the Android SDK. The file may include apps, system and user data from an Android 4.0 or later device, and is used for saving and restoring device snapshots. AB backups do not include the APK apps themselves, but only app and system support data.
Relevant ab file links:How to open ab file on Youtube
How to open ab file on Wikipedia
How to open ab file on Microsoft.com