Login with alternative user in a different window

Login to a fresh terminal and type

xinit gnome-session -- :2

Backup documents

#! /bin/bash
rsync -r --delete-excluded /home/justcop/Documents /mnt/Storage/Backups/

Then add to cron

backup USB drive on insertion

in autorun on USB pen

#! /bin/bash
rm -r /home/justcop/Documents/"USB backup"
mk dir /home/justcop/Documents/"USB backup"
cp -R /media/"JUSTCOP USB"/Documents /home/justcop/Documents/"USB backup"