$sourcedir="D:\workspace"

$targetdir="E:\newf"

$lastdate="2017-05-19"

$filelist=dir $sourcedir -recurse *.* | where-object{ $_ -is [System.IO.FileInfo] -and $_.LastWriteTime -gt [datetime]::Parse($lastdate) }

$filelist | ForEach-Object {

$_.FullName

$filedic=$_.DirectoryName

$filedic=$filedic.Replace($sourcedir,$targetdir)

md $filedic

Copy-Item $_.FullName ($filedic+"\"+$_.Name)

}