How to Fix Wrong Hard Drive Data Usage Calculation in OS X

How to Fix Wrong Hard Drive Data Usage Calculation in OS X

1. Make Sure Spotlight Is On and Indexing Is Enabled. First you need to make sure that Spotlight is enabled for your system. To do this: ...
2. Reindex Your Mac's Hard Drive. The next step is to have the system reindex the hard drive, which can be done in two ways: Reindex Your Hard Drive Using Spotlight's Preferences.