chmod +x ~/Home/Downloads/<backup-home.sh> (or wherever you saved it)
The script will then take you to the /mnt directory
You will the be shown the directories located inside of /mnt
You will be interactively requested to input the name of the directory you want the backup stored in
You will be required to input a "Y" (Case Sensitive) to confirm your designation The copy process will begin and you will be informed when it is completed, be patient and don't close the terminal preemptively.