WinDirStat is really great for windows. Not sure how fast it is relative to it's competition but it's fast enough and is intuitive (graphical representation is pretty good)

WinDirStat on Windows, Grand Perspective on OSX.

+1

I‘m on a Mac and I like DaisyDisk. The built-in one (in About this Mac) is sometimes good enough for finding useless large files.

For major cleanup in Windows, spotting file bloat in unexpected/temp places, SpaceMonger: https://spacemonger.en.softonic.com/ Rectangles are cool. (approximate) rect area based on nested folder size is cool. Smoothly zoomable regions with the mousewheel is cool. Their grabbing of colors from a simple pastel palette that guarantees that black text is crisply legible is cool. Having individual file details appear as screen real estate allowsm but for large files right away, is cool. Despite being a non-cacheing scanner for each run SM helps you spend time budgeted for cleanup most efficiently as possible.

Windirstat (windows, gpl) disinventoryx (OS X, gpl), du

Here is a clickable link for anyone interested in checking out diskover https://shirosaidev.github.io/diskover

That looks pretty cool - are those video effects or is it really showing files writing to different files?

The videos are realtime crawl using gource for visualizing the bots scraping the meta from files when they enter into directories. It pulls the crawl times/worker names from elasticsearch and visualizes it in gource. diskover has cli args for outputing to gource.

Treesize (https://www.jam-software.com/treesize_free/) is a great one for Windows.

Filelight, comes default on kde. It's freaking amazing.

I've even been using it on Windows. Love it!

These are all good for osx/windows scanning your local attached disk, but what about nas/san storage and crawling over nfs/cifs? Are any server based (run on server)? Do any have web file management/search ability?

Space sniffer on Windows: http://www.uderzo.it/main_products/space_sniffer/

For Windows: http://www.steffengerlach.de/freeware/ For Mac OS: DaisyDisk

Do not forget good ol' Sequoia View (Windows) :

http://www.win.tue.nl/sequoiaview/

WizTree on Windows. Way faster on NTFS than WinDirStat.

free and fast

Anyone managing nas/san storage? Curious what you are using to manage disk space on these storage systems with many TB/PB.

DaisyDisk on my Macbook but ncdu (Ncurses interface for du that is AMAZING) is great for everything else.

WinDirStat / Baobab

ncdu, it’s great to spot big files taking up space and you can directly delete files with a single button.

ncdu, df, du

Disk Inventory X for Mac

WinDirStat and Baobab.

df

DaisyDisk

DaisyDisk

du -sh * | sort -h

ncdu