What is in a backup.ab file?

Question

Using ADB tools for Android (my device had root), I executed the following command:



adb backup -all


After confirming the backup operation, I got a file titled backup.ab that is 350MB. A month later, my device booted with a System UI crash, and would not let me access anything on it. I got a new one (same model), and it is unrooted. What would running the command



adb restore backup.ab


restore to my Android? I want to know what is in the backup (and what restoring it would do), because I want to keep my current userdata. The new device also has a more stable system, so I would not want to restore that, either.



NOTE: This question was marked as duplicate and then ignored, so it has been deleted and reposted.


— Zackary | Sources

Answer

.ab backups only apps data and their apks as well as system settings.



What is contained:




  • apks and their data

  • user vocabulary

  • wallpaper

  • launcher settings



What is not contained:




  • contacts

  • sms

  • ringtones and custom sounds

  • activated input layouts



More detailed is here.


— Suncatcher | Sources

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