Why my app's storage is even bigger than the Macbook's original storage? See the attachment below: app is 126.68g while my macbook pro is 120.1 g? (By the way I only have a few apps, like Microsoft word PowerPoint excel...) And how can i delete my backup of 23.3 mb? Before upgrading to yosimite i did not have backup, while after upgrading to yosimite the backup of 23.3mb showd up (i never opened time machine and turned it on!!!) Can somebody help me?