Doing backup is easy with the Disaster Recovery System that is included for both CUCM and Unity Connection.
The pre-requisite is that you must have a SFTP server which you can download free from freeSSHd. The freeSSHd for Windows is quite easy to use.
Configuring freeSSHd
The freeSSHd resides under your taskbar.



Disaster Recovery System: Create a device profile
From Disaster Recovery System, Backup > Backup Device
Disaster Recovery System: Create a scheduler
From Disaster Recovery System, Backup > Scheduler


By default the scheduler is not enabled you have to enable the scheduler.
Manual Backup
From Disaster Recovery System, Backup > Manual Backup




I had an interesting issue wherein one of our clients noticed unusually high throughput spanning multiple hours on various interfaces. It turned out to be an anomaly with CUCM and Unity backup. The Unity backup would run for over 36 hours continuously.