DIRUSE (2K Resource Kit / XP Support Tools)

Display disk usage

Syntax
      DIRUSE [options] Folders...

Options
   /M  Display in Mb
   /K  Display in Kb
   /B  Display in bytes (default)
   /,  Use thousand separator when displaying sizes. 
   /Q:#	Quota limit, mark folders that exceed the size (#) with a "!".
           set %errorlevel% to ONE if any folders are found that
           exceed the specified size

   /*	Report on one level of subfolders (top-level folders)

   /D	Display only folders that exceed specified sizes.
   /S	Include detail of every subfolder in the output
   /O	Don’t check subfolders for quota overflow.
   /V	Display progress report for every subfolder

   /C	Use Compressed size instead of apparent size.
   /L	Output overflows to logfile .\DIRUSE.LOG.
   /A	generate an alert if quota is exceeded
       (requires the Alerter service)

Note: the '-' symbol can be used in place of the '/' symbol.

Example

C:\> DIRUSE /M /q:1.5 /* e:\users

“Work is achieved by those employees who have not yet reached their level of incompetence” ~ Laurence J. Peter (The Peter Principle)

Related

DIR - Display a list of files and folders
DirQuota - Create and manage quotas (File Server Resource Manager)
You can also list files with XCOPY /L
Freedisk.exe - check free disk space. (Win 2K ResKit)
FSUTIL - File and Volume utilities
Powershell: (Get-ChildItem C:\docs\* -recurse) | measure-object -property length -sum
Equivalent bash command (Linux): quotacheck - Scan a file system for disk usage