I find Windows Backup is a really good tool although I have one problem. By default Windows Backup will occupy 70% of the space available. It can be limited when you're using an external drive or something directly attached to the computer. However when you save to a network path there seems to be no way to limit the space used, and this is a problem when you have multiple computers backing up to the same location. Is there a way to limit the space used by Windows backup when saving to a network path?