Software in Person of Interest

Hello everyone !

First i'm not sure if it's the right place to post in but...

I'm looking for the name of the software that the character Finch used in s02e13 of Person of Interest when he's looking for what there is inside the fujima hard drive.
I can't find anything in typing "sector map" in google. I thinked you, guys, may know if this software really exist and if it exist, what's his name ?


I made a screen of the moment when Finch is using it :

https://image.bayimg.com/b882f4df2c5...3bad3254f8.jpg

PS: My english is far from perfect yet but i'm working on it (and i'm french :D), so i hope you'll understand.

It's very similar, but not identical to Filelight:

http://methylblue.com/filelight/

Yeah thank you very much !
After following links, it's likely similar to Daisydisk too (http://www.daisydiskapp.com/).

Ty GeneralZod !

Just like baobab, the gnome disk usage analyser which can be used in KDE if you don't mind all the GTK libraries that will also be pulled in, and that is in the repositories.