Prepend Date modified/LastWriteTime to all files in directory and subdirectories using Powershell 7 Core

prepend-date-recursive.bat

@echo off
REM Bat file intended to allow drag and drop of directories, as well as bypassing executionpolicy temporarily (instead of having to change it machine wide for a while)
pwsh -ExecutionPolicy Bypass -File "%~dp0prepend-date-recursive.ps1" "%1%"

prepend-date-recursive.ps1

$dir = $args

write-host $dir

$files = Get-ChildItem -Path "$dir" -Recurse -File |
    Where-Object { -not $_.Name.Contains("__") } |
    Rename-Item -NewName {$_.LastWriteTime.ToString("yyyyMMdd_HHmmss__") + $_.Name}