Stupid Simple Backup Solution - one-time bash script to backup all your user data folders at once.

backup.sh

#!/usr/bin/env bash

# Double compression doesn't make sense, leave as it is
final_backup_file="backup.tar" 
home_dir="/home/$(whoami)"

# Enter to the user directory
cd "$home_dir"

# Create temporary directory to group all archives
temp_dir=$(mktemp -d)
if [ ! -d "$temp_dir" ]; then
    echo "I cannot create a temporary directory"
    exit 1
fi

# Go through all directories, exclude hiddens and current dir
find . -maxdepth 1 -type d -not -path '*/.*' -not -path '.' -print0  | while IFS= read -r -d '' current_dir; do

    # Get the directory name
    base_name=$(basename "$current_dir")
    echo "Found a new folder: [$base_name]"

    # Check if the directory contains any files
    if find "$current_dir" -mindepth 1 -print -quit | grep -q .; then

        # Go inside
        cd "$current_dir" || { echo "I cannot go to $current_dir"; exit 1; }

        # Create archive
        tar -czf "${temp_dir}/${base_name}.tar.gz" *

        # Get back
        cd "$home_dir" || { echo "I cannot go to home directory"; exit 1; }
    else
        echo "Directory $current_dir is empty, omit."
    fi

done

# Go to temp
cd "$temp_dir" || { echo "I cannot go to $temp_dir"; exit 1; }

# Create final archive
tar -cf "$home_dir/$final_backup_file" *.tar.gz && echo "New archive was created: $home_dir/$final_backup_file"