It's really fun to use, you can drag pieces of the pie that represent space used on a disk into a bin designating they will be deleted. Might I mention that it has fun facts such as "64 gigabytes were deleted, did you know you just deleted the amount of space on an iPhone?"
DaisyDisk gives you a perfect overview of all the disks connected to your Mac, be it Macintosh HD, flash card, Thunderbolt disk or network storage. And does it in a beautiful way.
While working on your Mac you create and download a lot of files, but rarely delete anything. As time goes by you have less and less room for your data. DaisyDisk finds those hidden unused gigabytes.