_{❗This is an unofficial source, with the binaries being grabbed from the official website, no support will be provided for these binaries.❗}

SpaceSniffer is a freeware disk space analyzer for Windows that make use of the Treemap concept to view the current disk usage. Among the most notable features you'll find:

Features

• drag and drop support

• intuitive structure layout (multiple views for different media)

• zoom elements (browser-like navigation)

• powerful filtering (you can filter your results based on size file name age)

• customizable options (geometry, colors, behavior)

• fast scan of your hard drive (navigation worked even when the scan didn't finish)

• support for NTFS Alternate Data Streams and so on.

SpaceSniffer is fully portable on all modern Microsoft Windows versions (doesn't have a setup file. Therefore it doesn't mess up with your current registry - it just adds an XML configuration file). You can use the executable file on other Microsoft Windows OS; there's no need to extract the archive each time.