A very simple shell script to backup essentials files and folders written in bash which use rsync app which was tested in Linux:
# Backup Essential Files and Folders
#!/bin/bash -x
SOURCE_DIRS="/storage/Docs /storage/Media /storage/Stuff /storage/Work /home/dima /etc"
DESTINATION_DIR="/media/disk/backup/"
RSYNC=/usr/bin/rsync
RSYNC_OPTIONS="--archive --recursive --progress"
for folder in $SOURCE_DIRS
do
$RSYNC $RSYNC_OPTIONS $folder $DESTINATION_DIR
done