Total size of files older than a specific number of days

File_Size_With_Age.ps1

# Provided by itefix.net
Param
(
    [string]$path,
    [int]$numberDays
 )
 
 $cutOffDate = (Get-Date).AddDays(-$numberDays)
 
 $results = 
    Get-ChildItem -Path $path -recurse | 
    Where-Object {$_.LastAccessTime -le $cutOffDate} |
    select name, fullname, length, lastaccesstime

$size = ($results | measure -sum length | % {$_.sum / 1gb}).ToString("#.##")

Write-Host "Path: $path, Age: $numberDays days, size: $size GB" 

Usage: .\File_Size_With_Age.ps1 -path c:\temp -numberDays 90

Provided by itefix.net