Shell script to be used in emergency when your Final Cut Pro has taken up over 50% of drive space, and you can't operate the Mac in any normal fashion

move.sh

#!/bin/bash

EXTERNAL_BACKUP_DIR="/Volumes/data disk"
LIBRARY_NAME=$1

mv "$LIBRARY_NAME" $EXTERNAL_BACKUP_DIR/ & #send the move to background

# monitor the destination path 
raw footage library % lastSize=`du -s "$EXTERNAL_BACKUP_DIR/$LIBRARY_NAME" | tr '\t' ' ' | cut -d' ' -f1`; 
while true
do 
  size=`du -s "$EXTERNAL_BACKUP_DIR/$LIBRARY_NAME" | tr '\t' ' ' | cut -d' ' -f1`
  copyBytes=`expr $size - $lastSize`
  TIMESTAMP=$(date "+%y-%m-%d %H:%M:%S")
  echo "$TIMESTAMP move rate $(expr $copyBytes / 1024) kb/s"
  lastSize=$size
  sleep 1 
done