This article has answers to all your questions
http://baldwin-ps.blogspot.be/2013/07/empty-recycle-bin-with-retention-time.html
Code for posterity:
# -----------------------------------------------------------------------
#
# Author : Baldwin D.
# Description : Empty Recycle Bin with Retention (Logoff Script)
#
# -----------------------------------------------------------------------
$Global:Collection = @()
$Shell = New-Object -ComObject Shell.Application
$Global:Recycler = $Shell.NameSpace(0xa)
$csvfile = "\\YourNetworkShare\RecycleBin.txt"
$LogFailed = "\\YourNetworkShare\RecycleBinFailed.txt"
function Get-recyclebin
{
[CmdletBinding()]
Param
(
$RetentionTime = "7",
[Switch]$DeleteItems
)
$User = $env:USERNAME
$Computer = $env:COMPUTERNAME
$DateRun = Get-Date
foreach($item in $Recycler.Items())
{
$DeletedDate = $Recycler.GetDetailsOf($item,2) -replace "\u200f|\u200e","" #Invisible Unicode Characters
$DeletedDate_datetime = get-date $DeletedDate
[Int]$DeletedDays = (New-TimeSpan -Start $DeletedDate_datetime -End $(Get-Date)).Days
If($DeletedDays -ge $RetentionTime)
{
$Size = $Recycler.GetDetailsOf($item,3)
$SizeArray = $Size -split " "
$Decimal = $SizeArray[0] -replace ",","."
If ($SizeArray[1] -contains "bytes") { $Size = [int]$Decimal /1024 }
If ($SizeArray[1] -contains "KB") { $Size = [int]$Decimal }
If ($SizeArray[1] -contains "MB") { $Size = [int]$Decimal * 1024 }
If ($SizeArray[1] -contains "GB") { $Size = [int]$Decimal *1024 *1024 }
$Object = New-Object Psobject -Property @{
Computer = $computer
User = $User
DateRun = $DateRun
Name = $item.Name
Type = $item.Type
SizeKb = $Size
Path = $item.path
"Deleted Date" = $DeletedDate_datetime
"Deleted Days" = $DeletedDays }
$Object
If ($DeleteItems)
{
Remove-Item -Path $item.Path -Confirm:$false -Force -Recurse
if ($?)
{
$Global:Collection += @($object)
}
else
{
Add-Content -Path $LogFailed -Value $error[0]
}
}#EndIf $DeleteItems
}#EndIf($DeletedDays -ge $RetentionTime)
}#EndForeach item
}#EndFunction
Get-recyclebin -RetentionTime 7 #-DeleteItems #Remove the comment if you wish to actually delete the content
if (@($collection).count -gt "0")
{
$Collection = $Collection | Select-Object "Computer","User","DateRun","Name","Type","Path","SizeKb","Deleted Days","Deleted Date"
$CsvData = $Collection | ConvertTo-Csv -NoTypeInformation
$Null, $Data = $CsvData
Add-Content -Path $csvfile -Value $Data
}
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($shell)
#ScriptEnd