[Wiztree][1] is getting good reviews. It's free and portable too. It even detects changes like deleted folders.

> WizTree is similar to applications like WinDirStat, TreeSize and
> Folder Size but is MUCH faster

 - Finds the files and folders using the most space on your hard drive
 - VERY Fast! WizTree reads the master file table (MFT) directly from NTFS formatted hard drives (similar to the way Everything Search Engine works)
 - Visual Treemap allows you to spot large files and large collections of smaller files at a glance
 - Finds the largest files on your hard drive. Every single file on your hard drive can be sorted in order of size.
 - File Name Search - quickly locate files by name or wildcard match
 - Sort the contents of your entire hard drive by folder size and optionally delete files and folders
 - Scan ALL hard drive file system types (NTFS, FAT, FAT32, network, etc) and/or individual folders

[![enter image description here][2]][2]


  [1]: http://antibody-software.com/web/software/software/wiztree-finds-the-files-and-folders-using-the-most-disk-space-on-your-hard-drive/
  [2]: https://i.sstatic.net/Y8UOq.jpg