<# .SYNOPSIS Syncronizes two folders .DESCRIPTION This PowerShell script synchronizes (mirrors) the content of 2 directory trees by using Robocopy. Typical use cases are backups: at first everything is copied (full backup), afterward only changes are copied (incremental backup). IMPORTANT NOTE: Make sure the target path is correct because the content gets replaced (DATA LOSS)! .PARAMETER sourcePath Specifies the path to the source folder .PARAMETER targetPath Specifies the path to the target folder .EXAMPLE PS> ./sync-folder.ps1 C:\MyPhotos D:\Backups\MyPhotos .LINK https://github.com/fleschutz/PowerShell .NOTES Author: Markus Fleschutz | License: CC0 #> param([string]$sourcePath = "", [string]$targetPath = "") try { if ($sourcePath -eq "") { $sourcePath = Read-Host "Enter the path to the source folder" } if ($targetPath -eq "") { $targetPath = Read-Host "Enter the path to the target folder" } $stopWatch = [system.diagnostics.stopwatch]::startNew() $robocopyParameters = $sourcePath, $targetPath, '/MIR', '/FFT', '/NDL', '/NP', '/NS' # /MIR = mirror a directory tree # /FFT = assume FAT file times (2-second granularity) # /NDL = don't log directory names # /NP = don't display percentage copied # /NS = don't log file sizes robocopy.exe $robocopyParameters if ($lastExitCode -gt 3) { throw 'Robocopy failed.' } [int]$elapsed = $stopWatch.Elapsed.TotalSeconds "✔️ Synced 📂$sourcePath to 📂$targetPath in $elapsed sec" exit 0 # success } catch { "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])" exit 1 }