Get-PSDrive -PSProvider FileSystem | Select-Object Name, @{Name="FreeSpace(GB)";Expression={[math]::round($_.Free/1GB,2)}}, @{Name="UsedSpace(GB)";Expression={[math]::round(($_.Used/1GB),2)}}, @{Name="TotalSpace(GB)";Expression={[math]::round($_.Used/1GB + $_.Free/1GB,2)}}