This is an alternative to both Migrate Flasher normal and emergency flash if they hang on your backup file. Just drop this file on the root of your /sdcard then run a shell on your device and execute "bash /sdcard/android_extract.sh <full_path_to_migrate_zip>" i.e.: "bash /sdcard/android_extract.sh /sdcard/Migrate/Full_Backup_XYZ.zip", wait for …

android_extract.sh

#!/system/xbin/bash

# This is an alternative to both Migrate Flasher normal and emergency flash if
# they hang on your backup file.
#
# Just drop this file on the root of your /sdcard then run a shell on your
# device and execute the following command:
#
# bash /sdcard/android_extract.sh <full_path_to_migrate_zip>
#
# Example:
#
# bash /sdcard/android_extract.sh /sdcard/Migrate/Full_Backup_XYZ.zip
#
# Then wait for a few minutes and you should be able to give Migrate Helper a
# go to finish the process.

BACKUP=/sdcard/backup;
CACHE=/data/local/tmp/migrate_cache/;

if [ "$(id -u)" -ne 0 ]; then
    echo 'This script must be run as root.';

    exit 1;
fi;

if [ "$1" == '' ]; then
    echo 'Usage: ';
    echo '';
    echo 'bash '"$0"' source_zip';

    exit 1;
fi;

if [ ! -f "$1" ]; then
    echo 'The source file provided does not exist.';

    exit 1;
fi;

printf '\n';

for remainingTime in $(seq 3 -1 1); do
    printf '\rRemoving old unzip in '"$remainingTime"' seconds (press CTRL-C now if unsure!)...';
    sleep 1;
done;

rm -rfv "$BACKUP";
mkdir -p "$BACKUP";

# move inside the backup unzip path
cd $BACKUP;

echo "Unzipping backup...";
unzip "$1";

# make cache
echo "Making cache...";
mkdir -p $CACHE;

files="$(ls . | wc -l)"
echo "Approximate number of files: $files";

echo "Copying apps...";

# copy app info, apks and permission to cache
cp -v *.json $CACHE;
cp -va *.app $CACHE;
cp -v *.perm $CACHE;

# copy app data
cp -v *.tar.gz /data/data/;

# copy extras
echo "Copying extras...";
cp -v *.calls.db $CACHE 2>/dev/null;
cp -v *.sms.db $CACHE 2>/dev/null;
cp -v *.vcf $CACHE 2>/dev/null;
cp -v default.kyb $CACHE 2>/dev/null;
cp -v screen.dpi $CACHE 2>/dev/null;

# copy package data
echo "Copying package-data...";
cp -v package-data* $CACHE;

echo "Done! Please install Migrate Helper to continue.";

exit 0;