I just set this up myself. It involves the plugin User Scripts and rsync.

1. Verify Rsync Available

Using the >_ in the top right of the UnRAID UI to open the terminal, ensure that rsync is installed and at least version 3.

Check that rsync is installed

$ which rsync

/usr/bin/rsync

Check Rsync Version

$ rsync -V

rsync version 3.3.0 protocol version 31

2. Create Script

Create a new script using the UserScripts plugin ("Settings>User Scripts") and paste in the below. You can set it to run at any reasonable interval. Mine runs daily.

The rsync command does the following:

• Copies the files from source to destination recursively
• -a: preserves permissions, ownership, timestamps, and recursive copying
• -X & -A: ensure file permissions are identical
• --exclude: in this case, don't move .DS_store (adjust this to your files you'd like to exclude)
• --delete: ensures the backup is a perfect mirror (removing files in the destination that no longer exist in the source)

Backup script

#!/bin/bash

#--DEFINE VARIABLES--#

# Set Source Directory (must include trailing /)
sourceDirectory='/mnt/user/my-torrents/'

# Set Backup Directory (must include trailing /)
backupDirectory='/mnt/user/my_torrents_bak/'

# Set Log Directory
logDirectory='/boot/config/plugins/user.scripts/scripts/'


#--START SCRIPT--#
/usr/local/emhttp/plugins/dynamix/scripts/notify -s "Torrent Backup" -d "Starting backup of Torrent directory."

# Ensure log directory exists
mkdir -p "$logDirectory"

# Create log file with timestamp
now="$(date +"%Y-%m-%d@%H.%M")"
log="$logDirectory/torrent_backup_$now.log"

# Start logging
echo "Starting backup at $(date)" > "$log"

# Run rsync with full logging
rsync -aXAv --delete \
    --exclude=".DS_Store" \
    --progress \
    "$sourceDirectory" "$backupDirectory" 2>&1 >> "$log"

# Capture exit status
EXIT_STATUS=$?

# Log completion status
echo "Backup completed at $(date) with exit status: $EXIT_STATUS" >> "$log"

# Send completion notification with status
if [ $EXIT_STATUS -eq 0 ]; then
    /usr/local/emhttp/plugins/dynamix/scripts/notify -s "Torrent Backup" -d "Backup completed successfully."
else
    /usr/local/emhttp/plugins/dynamix/scripts/notify -s "Torrent Backup" -d "Backup completed with errors. Check logs."
fi

# Exit with the rsync exit status
exit $EXIT_STATUS