Installed Acronis about 1 1/2 months ago. Scheduled "incremental" backups each Friday. My drive C has only 31 gigs of used space while my backup drive G is now up to 120gig of used space. Soon it will be full. Not sure why it is taking up so much space in the drive since it was set to only change files that had been altered in the past week. Any suggestions as to how to stop the eventual filling of the backup drive would be appreciated. Still new at this but learned to backup or loose what you have on your disk.