Synchronize DIRECTORY from a VOLUME to the scripts location by script name, (here for OSX: look at SRC)

DIR_get_from_Volume.sh

#! /usr/bin/env bash

VOL=${0##*_}
DIR=${0%%_*}
SRC="/Volumes/${VOL%.*}/${DIR##*/}"

if [ -d "${SRC}" ]
  then
  rsync -ah -x --delete --stats --progress --exclude='.DS_Store' "${SRC}" "${0%/*}"
  else
  echo "ERROR: Directory '${SRC}' not found"
  read -sn1
  fi