How to do a Nandroid backup without TWRP?

It really isn’t (so long as you have access to a computer or VM running linux). You just

  • download this zip file,
  • unzip it, which wll create a directory called android-backup-project-v2.1
  • cd to the android-backup-project-v2.1 directory
  • connect your device
  • run adb devices to check the device is properly connected
  • run adb root to check that rooted debugging is enabled on the device
  • run the backup_apps.sh script
  • wait for it to complete

This tool shuts the device down, then restarts it running busybox, so Android is not running and the system is not live

The backed up apps and data can be restores to the same device, or a different device, running the same, ROM, an updated version of teh same ROM, or a completely different ROM.

It really isn’t difficult

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