PowerShell Scripts Blog: Get-FolderSize.ps1

Monday, 5 October 2009

Get-FolderSize.ps1

<#
.SYNOPSIS
This script displays the size of a folder
.DESCRIPTION
This script is a rewrite of an MSDN sample. It
uses System.IO namespace to determine the size
of a folder and its subfolders, then displays it.
Note that the Get-DirSize function is recursive!
.NOTES
File Name : Get-FolderSize.ps1
Author : Thomas Lee - tfl@psp.co.uk
Requires : PowerShell V2
.LINK
This script posted to: http://pshscripts.blogspot.com/2009/10/get-foldersizeps1.html
MSDN Sample posted at: http://msdn.microsoft.com/en-us/library/system.io.directory.aspx
.EXAMPLE
PSH [C:\foo]: .Get-FolderSize c:\foo
The size of C:\Foo and its subdirectories is 17,577,318 bytes
#>
param (
$folder = "C:\Foo"
)
##
# Helper Function Get-DirSize
##
function Get-DirSize {
param ([system.IO.DirectoryInfo] $d)
[long] $Size = 0;
# Add file sizes.
$fis = $d.GetFiles();
foreach ($fi in $fis){
$size += $fi.Length;
}
# Add subdirectory sizes recursively.
$dis = $d.GetDirectories()
foreach ($di in $dis) {
$Size += Get-DirSize($di)
}
return $Size
}
## End of Get-DirSize helper function
##
# Start of Script
$d = New-Object system.IO.DirectoryInfo $folder
$size= Get-Dirsize $d
"The size of {0} and its subdirectories is {1} bytes" -f $d,$size.ToString("###,###")

Technorati Tags: System.IO.DirectoryInfo,code,PowerShell,Script

8 comments:

garth arnold said...: Note - declare $Size as long if >2GB of files per folder.; 5 October 2009 at 17:17
Thomas Lee said...: Garth - great catch - sample updated to reflect this!; 6 October 2009 at 02:04
Unknown said...: Is line 31 correct? Currently
n] $Size = 0;; 3 November 2009 at 15:18
Thomas Lee said...: Larry - a typo that must have sneaked in after I created the sample. Thanks for the catch.; 4 November 2009 at 00:13
Unknown said...: Hmm, did that 'correction' remove the [long] declaration for $Size that you added on October 6?; 4 November 2009 at 22:21
Thomas Lee said...: Garth - well caught. Not my day I guess. But thanks for the catch and this is fixed.; 5 November 2009 at 01:04
KetanT said...: Hi Thomas,

How different is the below code from yours? I saw we could do recoursion through inbuilt PS command get-childitem rather than creating a function.

Param ($folder = "C:\test")

Function Get-Files()
{
param ([System.IO.DirectoryInfo] $d)

$files = dir $d -Recurse -Force | ?{$_.attributes -ne "Directory"}
return $files;

}

$xyz = New-Object System.IO.DirectoryInfo $folder

$files = Get-Files $xyz

[long]$size = 0;

foreach ($fi in $files) { $size += $fi.length}
"Total number of files are {0} and total size of the folder is {1} Bytes " -f $files.length, $size.tostring('##,##');; 28 November 2009 at 01:35
Anonymous said...: Thanks :-) this helped a lot :-)

I've tweaked it and the following would display the size of all profiles installed on a workstation:

param (
$folder = "C:\Documents and settings"
)

##
function Get-DirSize {
param ([system.IO.DirectoryInfo] $d)
[long] $Size = 0;

# Add file sizes.
$fis = $d.GetFiles();
foreach ($fi in $fis){
$size += $fi.Length;
}
# Add subdirectory sizes recursively.
$dis = $d.GetDirectories()
foreach ($di in $dis) {
$Size += Get-DirSize($di)
}
return $Size
}

# Start of Script

$a = New-Object system.IO.DirectoryInfo $folder
$aa = $a.GetDirectories()
foreach ($ab in $aa) {
$subf = $folder + "\" + $ab.Name

$d = New-Object system.IO.DirectoryInfo $subf
$size= Get-Dirsize $d
"{0} : {1:N2} " -f $d,($size / 1MB) + "MB"
}; 3 December 2009 at 08:42