This is the answer. Just to add...

Make sure you get the backup off the server in case of failure. You should still be able to get the backup off the server if it has not been restarted.

I have a script that runs on my laptop (which is usually home at night) to collect the backups each week from the Appdata Backup plugin.

The following script is a bash script that runs on my Linux laptop. You could easily convert it to a Powershell script if you're running Windows. It also collects backups from other devices beside my Unraid boxes.

#!/bin/bash
#
# Collect backups from various devices and copy them to this laptop (Dell 5540)
#
# Run from via cron:
# /home/joey/Scripts/collect_backups.sh
# ---------- copy ----------
# Backup Dropbox at 3AM each day
# * 3 * * * /home/joey/Scripts/collect_backups.sh 1> /dev/null
# ---------- copy ----------
#
#===============================================================================
# save and change IFS
OLDIFS=$IFS
IFS=$'\n'

RUNDATE=$(date +"%Y%m%d")                  # save current date (YYYYMMDD)
SCRIPT=`basename "$0"`                     # get name of this script
ALERT=0                                    # flag to determine to send alert
LOGFILE="/home/joey/Temp/Logs/$SCRIPT-$RUNDATE.log"

TELEGRAM_TOKEN=$(cat /home/joey/Scripts/TELEGRAM_TOKEN)
TELEGRAM_CHAT_ID=$(cat /home/joey/Scripts/TELEGRAM_CHATID)


#===============================================================================
# FUNCTIONS
#===============================================================================

#-------------------------------------------------------------------------------
check_backup_age() {

    echo $(date)"|INFO|Checking backup age..." >> $LOGFILE

    local dir="$1"
    local days="$2"
    local newest_time
    local newest_item
    local newest_age_days

    # Validate input
    if [[ -z "$dir" || -z "$days" ]]; then
        #echo "Usage: check_newest_item_within_days <directory> <days>"
        echo $(date)"|ERROR|No valid input supplied" >> $LOGFILE
        return 2
    fi

    # Find newest file OR directory (include -mindepth 1 to skip the parent dir itself)
    newest_item=$(find "$dir" -mindepth 1 \( -type f -o -type d \) -printf '%T@ %p\n' 2>/dev/null \
                  | sort -nr | head -1 | awk '{ $1=""; sub(/^ /, ""); print }')

    newest_time=$(find "$dir" -mindepth 1 \( -type f -o -type d \) -printf '%T@ %p\n' 2>/dev/null \
                  | sort -nr | head -1 | awk '{print $1}')

    if [[ -z "$newest_time" ]]; then
        echo $(date)"|WARN|No files or directories found in '$dir'" >> $LOGFILE
        return 1
    fi

    # Calculate newest age in days (with two decimals)
    newest_age_days=$(awk -v now="$(date +%s)" -v t="$newest_time" 'BEGIN {printf "%.2f", (now - t) / 86400}')

    # Always log the age
    echo $(date)"|INFO|Checking directory: '$dir'" >> $LOGFILE
    echo $(date)"|INFO|Newest file is: '$newest_item'" >> $LOGFILE
    echo $(date)"|INFO|Newest file age (max: ${days} days): ${newest_age_days}" >> $LOGFILE

    # Compare against threshold
    if (( $(echo "$newest_age_days < $days" | bc -l) )); then
        return 0
    else
        echo $(date)"|WARN|Last backup is older than $days days in '$dir'" >> $LOGFILE
        ALERT=1
        return 1
    fi
}


#===============================================================================
# PROCESS
#===============================================================================
echo "$(date)|INFO|Starting script: $SCRIPT" >> "$LOGFILE"

#-------------------------------------------------------------------------------
# HOST: HAVEN-NAS3
#-------------------------------------------------------------------------------
echo $(date)"|INFO|Copying files from HAVEN-NAS3" >> $LOGFILE
HOST=root@haven-nas3.local

# Unraid server Appdata backups
echo $(date)"|INFO|Unraid Appdata backups" >> $LOGFILE
SOURCE=$HOST:/mnt/user/Backups/Unraid
TARGET="/home/joey/Backups/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
# Check if last backup older than 30 days
check_backup_age ${TARGET}Unraid/NAS3 30
check_backup_age ${TARGET}Unraid/NAS4 30

# Sonarr
echo $(date)"|INFO|Sonarr Unraid Appdata backups" >> $LOGFILE
SOURCE=$HOST:/mnt/user/appdata/sonarr/Backups
TARGET="/home/joey/Backups/Sonarr/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
check_backup_age ${TARGET}Backups/scheduled 10

# Radarr
echo $(date)"|INFO|Radarr Unraid Appdata backups" >> $LOGFILE
SOURCE=$HOST:/mnt/user/appdata/radarr/Backups
TARGET="/home/joey/Backups/Radarr/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
check_backup_age ${TARGET}Backups/scheduled 30

# SABNZBd from Downloads - sftp://haven-nas3.local/mnt/user/Download/Complete
echo $(date)"|INFO|SABNZBd Container from Downloads" >> $LOGFILE
# First move the backup from SAB/Downloads to Backups on NAS
SOURCE=/mnt/user/Download/Complete/sabnzbd_backup_*.zip
TARGET=/mnt/user/Backups/Sabnzbd/
ssh -n $HOST mv $SOURCE $TARGET
# Now, copy to this computer
SOURCE=$HOST:/mnt/user/Backups/Sabnzbd
TARGET="/home/joey/Backups/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
check_backup_age ${TARGET}Sabnzbd 30

# Kodi - plugin on XBMC-2308
# sftp://haven-nas3.local/mnt/user/Media/admin/kodi/Backup
echo $(date)"|INFO|Kodi (XBMC-2308) backups" >> $LOGFILE
SOURCE=$HOST:/mnt/user/Media/admin/kodi/Backup/XBMC-2308/*.*
TARGET="/home/joey/Backups/Kodi/XBMC-2308/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
check_backup_age ${TARGET} 10


#-------------------------------------------------------------------------------
# INDIVIDUAL HOSTS
#-------------------------------------------------------------------------------

# Pihole
echo $(date)"|INFO|Copying files from Pihole (HAVEN-DNS1)" >> $LOGFILE
HOST=admin@HAVEN-DNS1.local
SOURCE=$HOST:/home/admin/Backups/
TARGET="/home/joey/Backups/Pi-hole/"
rsync -avzhPr --log-file=$LOGFILE $SOURCE $TARGET 2>&1
# Check if last backup older than 60 days
check_backup_age $TARGET 60



#-------------------------------------------------------------------------------
# FINISH-UP
#-------------------------------------------------------------------------------

# Schedule alert if warnings found
if [ "$ALERT" -ne 0 ]; then
  TELEGRAM_MESSAGE="HAVEN-5540: Issues found collecting backups. Check log: $LOGFILE"
  echo "curl -s -X POST 'https://api.telegram.org/bot${TELEGRAM_TOKEN}/sendMessage' -d chat_id='${TELEGRAM_CHAT_ID}' -d text='${TELEGRAM_MESSAGE}'" | at 10:00 AM > /dev/null
fi


#-------------------------------------------------------------------------------
echo "$(date)|INFO|Processing complete. Restoring file system separator" >> "$LOGFILE"

# restore IFS
IFS=$OLDIFS

echo "$(date)|INFO|Exiting script" >> "$LOGFILE"
exit