Convenient way creating MD5 for backup

#!/bin/sh

REPORT_PATH=$HOME/Desktop/LIFEBUOY/REPORTS
BACKUP_PATH="/Volumes/BRO FILMS-LIBUOY SHAMPOO/LIFEBUOY/19-DESEMBER-2014/RAW"
CARD_NAME=$2
MEDIA_NAME=$1

echo "REPORT_PATH = $REPORT_PATH"
echo "BACKUP_PATH = $BACKUP_PATH"

mkdir -pv "$REPORT_PATH/$CARD_NAME"

echo "Creating Media MD5 Checksums..."
find "/Volumes/$MEDIA_NAME" -type f -name "*.R3D" -exec md5 '{}' > "$REPORT_PATH/$CARD_NAME/media-md5.txt" \;

echo "Creating Backup MD5 Checksums..."
find "$BACKUP_PATH/$CARD_NAME" -type f -name "*.R3D" -exec md5 '{}' > "$REPORT_PATH/$CARD_NAME/backup-md5.txt" \;

MEDIA_MD5=$(cat "$REPORT_PATH/$CARD_NAME/media-md5.txt" | cut -d'=' -f2 | sed s/\ //)

echo $MEDIA_MD5

for token in $MEDIA_MD5; do
  grep $token "$REPORT_PATH/$CARD_NAME/backup-md5.txt"
done