How to overwrite files using robocopy regardless of their last change date

Question

I want my PowerShell script to take a backup of $destination directory, in $backup directory, but the newly created backup directory should be named $destination-{yyyy-dd-mm} where 'yyyy-dd-mm' is today's date.

I have written my 1st ever PowerShell script which accomplishes the job with one caeat. I have noticed that it creates a folder if it does not exist already and copies all the files into this folder the 1st time it is executed, but on subsequent runs it skips all files, if there is no change. I want to forcefully overwrite the destination files regardless of their last change date.

"START"

$source = "C:\Sandbox\Source"
$destination = "C:\Sandbox\Target"
$backup = "C:\Backups\"

"Taking backup of '$destination' in '$backup'"

$currentDate = Get-Date
$currentDate = $currentDate.ToString("yyyy-MM-dd")
$something = $backup + "Staging-" + $currentDate
robocopy $targetPath $something /E /V /MT /Z

"END"

Answer 1

I want to forcefully overwrite the destination files regardless of their last change date.

Use the /IS switch - Include Same, overwrite files even if they are already the same where Same is a file class:

Source: Robocopy "Robust File Copy" - Windows CMD - SS64.com

Answer 2

The robocopy argument you want, is " /IS".

$Arguments = @( '/IS', '/R:0', '/W:0', '/MT', '/E', '/A-:SH' )

$RoboCopy = 'C:\Windows\System32\Robocopy.exe'

$RoboCopyArgs = @($Source, $Destination, $Name) + $Arguments

& $RoboCopy @RoboCopyArgs

I have this robocopy powershell script for you. Hope you'll find it usefull.

https://www.tapuz.co.il/threads/%D7%94%D7%A2%D7%AA%D7%A7-%D7%A7%D7%91%D7%A6%D7%99%D7%9D-%D7%95%D7%95%D7%93%D7%90-%D7%99%D7%95%D7%A9%D7%A8%D7%AA-%D7%94%D7%94%D7%A2%D7%AA%D7%A7.15635089/post-145607055