Quote:
Backup Disk: Change the drive or volume you’re backing up to. Or back up to a Mac OS X server computer.


So yes, it can do this to a network drive. I am hoping that when it can't reach the disk/network share, it buffers the changes neede dto then later drop off when the disk is connected again.

The main issue they seem to be attempting to address here is hard drive failure, and then user mistakes second. So it makes sense to really push this as needing an external drive so that it can be a true backup, and not a false sense of security by backing up to a second partition on the same hard disk.