Help: WD MyCloud Overnight Backup Using Cron

I need to replace an aging Buffalo Live 500GB.

I don't need anything fancy or fast and looking around the WD MyCloud looked to fit the bill.

But I would also like to backup the contents to an external USB drive.

Looking at the WD MyCloud, whilst there is a backup utility you have to manually run it. I would really like something that I could leave connected and the backups would just happen overnight.

I had just about ruled out the WD MyCloud when I heard someone say that you could...

Help: WD MyCloud Overnight Backup Using Cron