Unused disk space conflicting reports

Hey Guys,

I'm using istat and OmniDisk sweeper to free up some space on my HD. Istat is telling me I'm using 200GB. When i run omni disk it says i'm using 200GB at the MacHD drive level, but when i go into the folders in the drive it only shows about 100GB used which i think is accruate. Any clue where this extra 100gb might be and isn't showing up?

Thanks! the issues was the local backup snapshots. Once I killed that via terminal and rebooted it fixed the issue.