Copy-Item failing with -Destination Parameter defined by script block

I am trying to develop a powershell script that will allow me to archive all files that are older than 2 years and copy over their parent directories to a new root folder. I would also like to delete the original file and any empty directories after the archiving has been completed.

I have the below function which should allow me to do the first part (moving the files and parent directories) being called from a test script at the moment and it is failing with the error:

Copy-Item : Cannot evaluate parameter 'Destination' because its argument is specified as a script block and there is no input. A script block cannot be evaluated without input. At C:\Users\cfisher\Documents\WindowsPowerShell\Modules\ShareMigration\ShareMigration.psm1:99 char:43 + Copy-Item -Force -Destination { + ~ + CategoryInfo : MetadataError: (:) [Copy-Item], ParameterBindingException + FullyQualifiedErrorId : ScriptBlockArgumentNoInput,Microsoft.PowerShell.Commands.CopyItemCommand

Here is the function:

Function ArchiveFiles { [CmdletBinding()]

Param ( [Parameter(Mandatory=$True)][string]$SourceDirectory, [Parameter(Mandatory=$True)][string]$DestinationDirectory, [Parameter(Mandatory=$True)][ValidateSet('AddMinutes','AddHours','AddDays','AddMonths','AddYears')][string]$TimeUnit, [Parameter(Mandatory=$True)][int]$TimeLength ) Begin { Write-Host "Archiving files..." -ForegroundColor Yellow -BackgroundColor DarkGreen } Process { $Now = Get-Date $LastWrite = $Now.$TimeUnit(-$TimeLength) $Items = Get-ChildItem -Path $SourceDirectory -Recurse | where { $_.LastWriteTime -lt "$LastWrite" } ForEach($Item in $Items) { Copy-Item -Force -Destination { If ($_.PSIsContainer) { If (!(Test-Path -Path $_.Parent.FullName)) { New-Item -Force -ItemType Directory -Path ( Join-Path $DestinationDirectory $_.Parent.FullName.Substring($SourceDirectory.length) ) } Else { Join-Path $DestinationDirectory $_.Parent.FullName.Substring($SourceDirectory.length) } } Else { Join-Path $DestinationDirectory $_.FullName.Substring($SourceDirectory.length) } } } } End { Write-Host "Archiving has finished." -ForegroundColor Yellow -BackgroundColor DarkGreen } 

}

I thought that passing the results of Join-Path as input to the -Destination parameter would do the trick, but it does not seem to be playing along. Do I need to create new items for each path or something? Kind of new to powershell so sorry if this looks sloppy. I appreciate any constructive criticism and solutions.

Thanks!