Backup using TWRP, then execute the following on the Android device using the terminal spawned from TWRP. Ensure that the external SD card has more than sufficient space.
tar -cvpzf /external_sd/backup.tar.gz /data/media/0Install new firmware or restore your backup, then install TWRP, reboot to TWRP and then execute the following on the Android device using the terminal spawned from TWRPneed to:cd /tar -xvpzf /external_sd/backup.tar.gz --numeric-ownerthe cd / is necessary. Otherwise, the files get restored to unintended directories!
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