$numberOfDays = ""
$pathToArchive = ""
$csvPath = ""


Function Get-ArchivableFiles

{

 Param([string[]]$path,

       [int]$numberDays)

 $cutOffDate = (Get-Date).AddDays(-$numberDays)

 Get-ChildItem -Path $path -recurse |

 Where-Object {$_.LastAccessTime -le $cutOffDate}

}

$results = Get-ArchivableFiles -path $pathToArchive -numberDays $numberOfDays  | select name, fullname, length, lastaccesstime

$results | Export-CSV $csvPath

$results | measure -sum length | % {$_.sum / 1gb}