One of my favorite tools for years has been TreeSize Free. It is a small, easy, fast and portable tool that can be used to determine disk space usage of folders and files on a volume.

In the past it had some limitations that hindered me, but with the latest updates they’ve added great features that I really love:

• TreeSize Free now scans network drives (except Windows servers and network drives within a Windows domain).
• TreeSize Free provides a touch-optimized user interface as an option for Windows 8.0 and higher.
• Users can now search for folders in the directory tree.
• TreeSize Free supports selection of multiple files now, e.g. to delete or move them.
• The scan performance on local NTFS drives (especially on SSD drives) has been increased.

So be sure to check out TreeSize Free if you hadn’t already or if you’re on an older version, download the latest version.

For those that run into the limitations regarding network drives with TreeSize Free, take a look at the commercial versions of TreeSize or other free disk space analyzer programs like Space Sniffer, WinDirStat, JDiskReport, Disk Analyzer Pro, Daisy Disk, Space Gremlin, etc.