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Backups Using too much disk space
I've got Norton Security with Backup Premium. I use the backup to save files to a network drive. The problem is that I've now got 200GB of space used on the backup drive for less than 100GB of used space on the drive being backed up. Why does it need twice as much space on the backup drive as the files being backed up? Is it just copying the files over any time they change without deleting the old versions? If this is so, how do I control it? Is there some way to switch back and forth between backup sets or something so I can purge the old stuff? I don't understand why its using so much space.