This script takes your command-line input for the root source and dest. folders and will copy (archive) any files older than the $days specified. By doing it folder by folder (not using the recursive parameter and piping results to copy individual files) we build a relatively small list of files and process those before moving to the next folder…

ArchiveFileServer.ps1

################################################################################
#                          FILE ARCHIVING SCRIPT                               #
#*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*&&*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*#
# AUTHOR: Tim Caldwell              DATE: 22/02/2013                           #
# DESCRIPTION:                                                                 #
# This script takes your command-line input for the root source and dest.      #
# folders and will copy (archive) any files older than the $days specified     #
################################################################################

################################################################################
# GET COMMAND-LINE PARAMS
param(
    [Parameter(
        Mandatory = $true,
        Position = 0,
        HelpMessage = "Root of the folders or share to archive"
    )]
    [String]$source,
 
    [Parameter(
        Mandatory = $true,
        Position = 1,
        HelpMessage = "Path of the folder or share of archive"
    )]
    [string]$target,
 
    [Parameter(
        Mandatory = $false,
        Position = 2,
        HelpMessage = "Age in Days of files to archive"
    )]
    [int]$days = 30
)
################################################################################
# Initialise our functions

#returns only folders within this level
Function Get-SubFolders ($dir)
{
    return (Get-ChildItem -LiteralPath $dir -ErrorVariable $SCRIPT:ErrorLog | `
        Where {$_.Attributes -match "Directory"} | Select FullName | `
        %{$_.FullName});
}

#returns only files within this level
Function Get-Files($dir)
{
    return (Get-ChildItem -LiteralPath $dir -ErrorVariable $SCRIPT:ErrorLog | `
        Where {$_.Attributes -notmatch "Directory" `
            -and ($SCRIPT:date - $_.lastwritetime).totaldays -gt $SCRIPT:days `
            -and $_.extension -ne ".lnk" `
            -and $_.extension -ne ".archlnk" `
            -and $_.FullName.Length -lt 229} | 
        Select FullName | %{$_.FullName});
}

# MAIN FUNCTION
#Processes files from each folder passed in and calls itself for subfolders
Function CopyFiles($dir)
{
    #Display Progress Bar
    Write-Progress -Id 0 -Activity "Processing Files" `
    -Status "Processing $dir...";
    
    #Get Files
    $files = Get-Files $dir
    
    #only copy if there are files in the folder
    if ($files -ne $null)
    {
        Write-Progress -Id 0 -Activity "Processing Files" `
        -Status "Processing $dir..." `
        -CurrentOperation "Copying Files...";
        
        #set destination folder
        $dest = $dir.replace($SCRIPT:source,$SCRIPT:target);
        
        Copy-Item -LiteralPath $files -Destination $dest -Force `
        -ErrorVariable $SCRIPT:ErrorLog;

        #Apply Permissions
        Write-Progress -Id 0 -Activity "Processing Files" `
        -Status "Processing $dir..." `
        -CurrentOperation "Applying Permissions...";
    
        ForEach ($file in $files)
        {
            &icacls $file /c /save Permissions | Out-Null
            $destFile = $file.Replace($SCRIPT:Source,$SCRIPT:target)
            &icacls (Split-Path $destFile) /restore Permissions | Out-Null
        }
    }
    
    #Preserve Memory by deleting file variable
    Remove-Variable -Name "files" -Force;
    
    #Get and Process sub folders
    $folders = Get-SubFolders $dir;
    if ($folders -ne $null)
    {
        ForEach ($subFolder in $folders)
        { 
            $destFolder = $subFolder.Replace($SCRIPT:source,$SCRIPT:target)
            if (!(Test-Path $destFolder))
                { [Void] (md $destFolder)}
            
            #Set folder permissions
            &icacls $subFolder /c /save Permissions  | Out-Null;
            &icacls (Split-Path $destFolder) /restore Permissions  | Out-Null;
            
            #Copy Files
            CopyFiles $subFolder;
        }
    }
    Remove-Variable -Name "folders" -Force;
}


################################################################################
# Script Variables

$SCRIPT:ErrorLog = $null
$SCRIPT:source = $source.TrimEnd("\"); # Getting rid of any trailing slashes is
$SCRIPT:target = $target.TrimEnd("\"); # necessary for icacls to work
$SCRIPT:days = $days;
$SCRIPT:date = Get-Date;

################################################################################
#create C:\Temp -- used to store permissions file during file permission copying
[void] (md "C:\Temp")
[void] (cd "c:\Temp")

#Create base target directory, set permissions to those on source base directory
cls

[void] (md $SCRIPT:source.replace($SCRIPT:source,$SCRIPT:target))
    &icacls $SCRIPT:source /c /save Permissions;
    &icacls $SCRIPT:target /inheritance:r;
    &icacls (Split-Path $SCRIPT:target) /restore Permissions;

#Get Start Time for logging/performance measure purposes
$startTime = Get-Date

################################################################################
$Error.Clear();
CopyFiles $SCRIPT:source;
################################################################################

#Get End Time
$endTime = Get-Date

#Display Results & Errors
$ProcessingTime = $EndTime.Subtract($StartTime)
"ExecutionTime: $ProcessingTime" | Out-Default
"" | Out-Default
$SCRIPT:ErrorLog | Out-Default
"" | Out-Default
$Error