function Get-FileHashValue {
    param (
        [string]$FilePath
    )
    if (Test-Path $FilePath) {
        return (Get-FileHash -Path $FilePath -Algorithm SHA256).Hash
    } else {
        return $null
    }
}

$SourcePath = "\\23.158.40.80\Accounting"
$DestinationPath = "Z:\"

# Ensure the destination exists
if (!(Test-Path -Path $DestinationPath)) {
    Write-Host "Destination path does not exist: $DestinationPath"
    exit
}

# Get all files in source directory
$SourceFiles = Get-ChildItem -Path $SourcePath -Recurse -File

foreach ($SourceFile in $SourceFiles) {
    # Define relative path
    $RelativePath = $SourceFile.FullName.Replace($SourcePath, "").TrimStart("\\")
    $DestFile = Join-Path -Path $DestinationPath -ChildPath $RelativePath
    
    # Create destination folder if it does not exist
    $DestFolder = Split-Path -Path $DestFile -Parent
    if (!(Test-Path -Path $DestFolder)) {
        New-Item -ItemType Directory -Path $DestFolder -Force | Out-Null
    }

    # Get checksum values
    $SourceHash = Get-FileHashValue -FilePath $SourceFile.FullName
    $DestHash = Get-FileHashValue -FilePath $DestFile
    
    # Display checksum values
    Write-Host "Checking file: $SourceFile.FullName"
    Write-Host "Source Checksum: $SourceHash"
    Write-Host "Destination Checksum: $DestHash"
    
    # Copy if hashes are different or file does not exist
    if ($SourceHash -ne $DestHash) {
        Write-Host "Copying: $SourceFile.FullName -> $DestFile"
        Copy-Item -Path $SourceFile.FullName -Destination $DestFile -Force
    }
}