When I manage my Windows 7 Backup's disk usage through the "Manage space used by this backup" and then "View backups..." options, I see two backup periods.
That report implies I will free up 1.14 TB if I delete the "12/9/12 to 1/1/13" backup period and leave 84.49 GB of backup data untouched. But how is that possible? My backup target(s) total 517 GB, far more than the second period.
So I am wondering...
- Will Windows Backup preserve/promote the file data required for "1/2/2013 to 1/5/2013" to remain a complete backup, therefore resulting in a "1/2/2013 to 1/5/2013" backup period that is 500+ GB in size?
- Or will Windows Backup discard everything discovered during the "12/9/2012 to 1/1/2013" backup period, even if the newer backup period needs it, therefore leaving the backup largely incomplete until another backup is performed?
The dialog says "All files backed up during the selected period will be deleted," but I find it surprising that I should have to forfeit ~80% of my backup (a huge date range of incremental data), and then run it again before a disk failure, just to free up some space on the backup target.