JDiskReport
The tool analyses your NVMe and SSD drives and collects the statistics which you could view as overview graphical charts and it shows the sizes of files and folders in a special graphical way called “tree maps”.
App description: JDiskReport 1.4.1
App description: System
The good: Free
The bad: None
Updated: March 31, 2017
System requirements: The program requires OS X 10.10 or later. If you have Java 9, use the JDiskReport 2 preview.