Macos System High Disk Usage

abungi:~ andy$ sudo tmutil listlocalsnapshots / Password: com.apple.TimeMachine.2018-06-06-030113 com.apple.TimeMachine.2018-06-06-051431 com.apple.TimeMachine.2018-06-06-101046 com.apple.TimeMachine.2018-06-06-160307 com.apple.TimeMachine.2018-06-06-163252 abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-030113 Deleted local snapshot '2018-06-06-030113' abungi:~ andy$ sudo tmutil listlocalsnapshots / com.apple.TimeMachine.2018-06-06-051431 com.apple.TimeMachine.2018-06-06-101046 com.apple.TimeMachine.2018-06-06-160307 com.apple.TimeMachine.2018-06-06-163252 abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-051431 Deleted local snapshot '2018-06-06-051431' abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-101046 Deleted local snapshot '2018-06-06-101046' abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-160307 Deleted local snapshot '2018-06-06-160307' abungi:~ andy$ sudo tmutil listlocalsnapshots / com.apple.TimeMachine.2018-06-06-163252 abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-16322 Error parsing argument 2018-06-06-16322 abungi:~ andy$ tmutil deletelocalsnapshots 2018-06-06-163252 Deleted local snapshot '2018-06-06-163252' abungi:~ andy$ sudo tmutil listlocalsnapshots / abungi:~ andy$