Sync Folders with Powershell - New and edited Files - powershell

Question

I am trying to Sync 2 Folders with Powershell.
Comparing and copying any new Files works just fine. But I want to additionally copy all files that got modified in the reference Foler.
The following Code works and copys all new Files which got created in the reference Folder.
$folderReference = 'C:\Users\Administrator\Desktop\TestA'
$folderToSync = 'C:\Users\Administrator\Desktop\TestB'
$referenceFiles = Get-ChildItem -Recurse -Path $folderReference
$FolderSyncFiles = Get-ChildItem -recurse -Path $folderToSync
$fileDiffs = Compare-Object -ReferenceObject $referenceFiles -DifferenceObject $FolderSyncFiles
foreach ($File in $fileDiffs){
try {
if ($File.SideIndicator -eq "<="){
$FullSourceObject = $File.InputObject.Fullname
$FullTargetObject = $File.InputObject.Fullname.Replace($folderreference, $folderToSync)
Write-Host "copy File: " $FullSourceObject
copy-Item -Path $FullSourceObject -Destination $FullTargetObject
}
}
catch {
Write-Error -Message "Something went wrong!" -ErrorAction Stop
}
}
Now I also want to copy the modified Files.
I tried -property LastWriteTime after the Compare-Objectbut I get a WriteErrorException when running the code.
Do you guys have some tips on how to get this Code to run properly?
Thanks in advance

Answer 1

I'd just use robocopy, it's built specifically for this type of task and included in most modern versions of windows by default:
robocopy C:\Source C:\Destination /Z /XA:H /W:5
/Z - resumes copy if interrupted
/XA:H - ignores hidden files
/W:5 - shortens wait for failures to 5 sec (default 30)
Worth taking a look through the documentation as there's many different options for practically every situation you can think of...
For example, add /MIR and it will remove any files from the destination when they are deleted from source.