Get-ChildItem "C:\Users\91977" -Force -Directory | ForEach-Object {
    $size = (Get-ChildItem $_.FullName -Force -Recurse -File -ErrorAction SilentlyContinue |
             Measure-Object Length -Sum).Sum

    [PSCustomObject]@{
        Folder  = $_.FullName
        Size_GB = [Math]::Round($size / 1GB, 2)
    }
} | Sort-Object Size_GB -Descending