I got an ab file with adb from my phone's notes folder. Which I can not access without root. I am trying to convert it to the tar file but cmd gives me this error in the picture. My command was ;

Java -jar abe.jar unpack MyFile.ab MyFile.tar password

And I'm trying to use this with Android Backup Extractor Master with Gradle. Can you help me please I'm trying to save this file for over 100 days.


  • 1
    Hi Kaan, it is much easier to read if you post teh text of teh error instead of a screenshot. Sep 18, 2023 at 0:49
  • How large is the MyFile.ab file` If it is less than 1Kb then it is most likely invalid.
    – Robert
    Sep 18, 2023 at 7:14
  • The file name suffix .ab is no guarantee of this type of backup file format. Please show the hexadecimal header of the file.
    – alecxs
    Sep 18, 2023 at 8:06
  • Invalid format. Compression header not found: github.com/nelenkov/android-backup-extractor/blob/… Sep 18, 2023 at 20:31
  • @RohitGupta i tried but i couldnt do it sorry Sep 19, 2023 at 17:39


You must log in to answer this question.

Browse other questions tagged .