An opinionated backup script using Robocopy. This script will sync files onto a path that you specify. Must be run as an Administrator. Modify as per your use case.

EasyRobocopyBackup.ps1

#Requires -RunAsAdministrator

param(
  [Parameter(Mandatory)]
  [string]$BackupPath
)

# You can use this function on its own instead of using the entirety of this script
function SyncFiles {
    param (
        [Parameter(Mandatory)]
        [string]$SourcePath,
        [Parameter(Mandatory)]
        [string]$DestinationPath,
        [Parameter(Mandatory)]
        [string]$LogPath,
        [Parameter()]
        [string[]]$ExcludedDirs,
        [Parameter()]
        [switch]$DryRun
    )

    robocopy "$SourcePath" "$DestinationPath" *.* `
      /mir /fft /zb /sl /xo /xd $ExcludedDirs /w:5 /r:5 /unilog:"$LogPath" `
      $(if ($DryRun) { "/l" } else { "" })
}

$backupPathExists = Test-Path $BackupPath

if ($backupPathExists) {
    try {
        Write-Host "Syncing files..."

        # Add or remove directories as necessary
        SyncFiles `
          -SourcePath (Get-Item ~\Documents).FullName `
          -DestinationPath "$BackupPath\Documents" `
          -LogPath "$BackupPath\Documents.log" `
          -ExcludedDirs "node_modules"
          
        SyncFiles `
          -SourcePath (Get-Item ~\Pictures).FullName `
          -DestinationPath "$BackupPath\Pictures" `
          -LogPath "$BackupPath\Pictures.log"
          
        SyncFiles `
          -SourcePath (Get-Item ~\Downloads).FullName `
          -DestinationPath "$BackupPath\Downloads" `
          -LogPath "$BackupPath\Downloads.log" `
          -DryRun

        Write-Host "Sync completed!"
    }
    catch {
        Write-Host "A problem was encountered while syncing files:"
        Write-Host $_
    }
}
else {
    Write-Host "Backup path $BackupPath can not be found."
}