A powershell script to help in many scenarios where you need to get older files elsewhere; e.g. archive scenarios (though doesn't include compression) / cases where you have a fileshare with too many historic files to be workable

Archive-Files.ps1

function Get-FilesInDirectory {
	[CmdletBinding()]
	Param (
		[Parameter(Mandatory)]
		[string]$Path
		,
		[Parameter(Mandatory)]
		[string]$SearchPattern
		,
		[Parameter()]
		[Switch]$Recursive
	)
	[System.IO.SearchOption]$SearchOption = @([System.IO.SearchOption]::TopDirectoryOnly,[System.IO.SearchOption]::AllDirectories)[[int]$Recursive.IsPresent]
	# use enumerate so we get ienumerable instead of array / can start moving files as soon as we get results.
	[string]$absPath = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($Path) # use this instead of resolve-path so things work with UNC paths
	[System.IO.Directory]::EnumerateFiles($absPath, $SearchPattern, $SearchOption)
}
Function Skip-RecentFiles {
	[CmdletBinding()]
	Param (
		[Parameter(Mandatory, ValueFromPipeline)]
		[System.IO.FileInfo]$InputObject
		,
		[Parameter()]
		[int]$RecentDays = 90
	)
	Begin {
		$Until = (Get-Date).AddDays(0-$RecentDays).ToUniversalTime()
	}
	Process {
		if ($InputObject.CreationTimeUtc -lt $Until) {
			$InputObject
		}
	}
}
Function ConvertTo-FolderStructure {
	[CmdletBinding()]
	Param (
		[Parameter(Mandatory, ValueFromPipeline)]
		[System.IO.FileInfo]$InputObject
		,
		[Parameter()]
		[string]$ArchiveRootPath = '.'
		,
		[Parameter()]
		[string]$ArchivePathFormat = '{0:yyyy/MM/dd}'
		,
		[Parameter()]
		[string]$DatePropertyName = 'CreationTimeUtc'
		,
		[Parameter()]
		[Switch]$PassThru
	)
	Begin {
		$archiveRoot = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($ArchiveRootPath) #note: the archive path may not exist - this caters for that scenario
		$previousArchivePath = $null # used as a minor optimisation to avoid the overhead of recreating folders if our last folder was the same
	}
	Process {
		$itemArchivePath = Join-Path (Join-Path -Path $archiveRoot -ChildPath ($ArchivePathFormat -f ($InputObject | Select-Object -ExpandProperty $DatePropertyName))) -ChildPath ''
		if ($itemArchivePath -ne $previousArchivePath) {
			if (-Not (Test-Path -Path $itemArchivePath -PathType Container)) {
				New-Item -Path $itemArchivePath -Type Directory -Force | Out-Null
			}
			$previousArchivePath = $itemArchivePath
		}
		if ($PassThru.IsPresent) {
			([PSCustomObject]@{
				Item = $InputObject
				ItemArchivePath = $itemArchivePath
			})
		} else {
			$itemArchivePath
		}
	}
}
Get-FilesInDirectory -Path 'c:\temp\' -SearchPattern *.* | 
	Skip-RecentFiles -RecentDays 600 | 
	ConvertTo-FolderStructure -ArchiveRootPath 'c:\temp\archivedemo' -PassThru |
	ForEach-Object {Move-Item -Path $_.Item.FullName -Destination $_.ItemArchivePath}