Use rsync to do incremental backup, that utilises "--link-dest" instead of "--backup". This allows the benefit of having all the files in a single directory

backup.sh

#!/bin/bash

# EXTEND AS NEEDED
# Derived from https://www.howtogeek.com/175008/the-non-beginners-guide-to-syncing-data-with-rsync/

# confable
# backup_misc_dir needs to be absolute. careful!
to_backup="$(pwd)/Moonglow"
backup_dir="$(pwd)/Moonglow Backups"
backup_misc_dir="$backup_dir/logs and misc"

# hardcoded
time=$(date +"%Y-%m-%d-%H%M")
timeB=$time"-basis"
time_latest="$backup_misc_dir/time-latest.txt"
time_old="$backup_misc_dir/time-previous.txt"
log=$backup_misc_dir/$time.log
logB=$backup_misc_dir/$timeB.log

# init if new
[ ! -d "$backup_dir" ] && mkdir -p "$backup_dir"
[ ! -d "$backup_misc_dir" ] && mkdir -p "$backup_misc_dir"
if [ ! -f "$time_latest" ]; then
    echo $timeB > "$time_latest"
    rsync -ahP --delete --delete-excluded --stats --log-file="$logB" "$to_backup/" "$backup_dir/$timeB/"
    echo "Init completion"
    exit  # because it is new
fi

# update time tracker
cp -f "$time_latest" "$time_old" # preserve old
echo $time > "$time_latest"    # generate new

#rsync command
rsync -ahP --delete --delete-excluded --stats --log-file="$log" --link-dest="$backup_dir/$(cat "$time_old")" "$to_backup/" "$backup_dir/$time/"