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We will also need the original Android Backup file “ ” to extract the header information.

To do this, we will have to compress the tar archive and append the 24-byte header found on the original Android Backup file. To restore the original Android Backup archive, run adb like this:īut if you have made changes to the contents of the files stored in the tar acrhive, you will need to recreate the ADB Backup archive. You will now be able to extract the file using the tar command. $ dd if= ibs=24 skip=1 | openssl zlib -d > Īnother way is to use the tail command instead of the dd command to strip the headers. Once stripped of the header, we will have to decompress the raw zlib data using openssl. The ADB backup can be converted to a TAR archive in two steps.

apk file is disabled and only the contents are backed up. The “ -noapk” option means that a backup of the. The backup will be written to the file specified in the “ -f” option, in our case, it’s “ “. It may take a while, depending on the size of the data to be backed up. Wait for the ADB backup command to complete. The backup will start only after you click on the button. Click on the “ Back up my data” button without providing a password. This will trigger a confirmation dialog prompting you to authorise the backup on your phone as shown below. If you want to backup WhatsApp, run adb like this: To perform a backup, connect the phone to the computer via USB and run the ADB backup command. For WhatsApp, the URL is and the package name can be found after the “ id=” field. You can get a list of the installed packages by running the pm list packages command from the ADB shell.Īnother easier way is to extract the package name from the app’s Google Play Store web URL. For example, if you want to perform a backup of the WhatsApp application, the package name would be “ com.whatsapp“. To perform an ADB backup, you will first need to know the package name of the app in question. An attempt to perform an ADB backup on such apps will only generate a dummy file with no valid content inside. Apps like the Google Authenticator have disabled the ADB backup feature to prevent sensitive information from being extracted from the device.