how to know used or empty disk space mac os x el Capitan
When I right click Macintosh icon on desktop and select info it shows about half the space empty.
Capacity: 499.05 GB Available:261.97GB
But when I click on the apple icon on top left of the screen and select
storage it also shows about the same gb of empty space on hard disk 261.26 free of 499.05 GB in numeric values but the color bar shows about 20% empty space and the space occupied by various items if added up leaves only about 90 gb of empty space.
Please let me know why there is discrepancy and which one is correct?
MacBook Pro (Retina, 15-inch, Mid 2014), OS X Yosemite (10.10.3)