Purpose:
  A command-line utility to display the volume name,
  free space, space used and total size of a disk volume.

Sample input and output:

C:\>DiskSize C: /Pct /Fre /Usd /Ttl

C: Disk  (55% Free, 45% Used)
  Free Space:  40,585,723,904 Bytes  39,634,496 KB  38,705.56 MB  37.80 GB
  Space Used:  33,754,320,896 Bytes  32,963,204 KB  32,190.63 MB  31.44 GB
  Total Size:  74,340,044,800 Bytes  72,597,700 KB  70,896.19 MB  69.23 GB

Banner Help:

DiskSize 1.9  http://pubs.dyadic.org
Usage: DiskSize [DriveLetter:] [/?] [/Hlp] [/All]
         [/Ttl] [/Fre] [/Usd]
         [/B] [/K] [/M] [/G]
         [/PctFre] [/PctUsd] [/Pct]

Command-line parameters (all are optional):

  DriveLetter: Which disk volume to report on (Default is current)
  /?           Display Short Help
  /Hlp         Display Long  Help
  /All         Display All options

  /Ttl         Display Total Disk Size (Default)
  /Fre         Display Disk Space Free
  /Usd         Display Disk Space Used

  /B           Display sizes in     Bytes
  /K           Display sizes in Kilobytes
  /M           Display sizes in Megabytes
  /G           Display sizes in Gigabytes

  /PctFre      Display percentage of Disk Space Free
  /PctUsd      Display percentage of Disk Space Used
  /Pct         Display both Free and Used percentages

Notes:
  If scale is not specified, then all scales are displayed.
  This utility is intended for use on local volumes -
    it has not been tested on network volumes.
  More information is available at http://pubs.dyadic.org/forum