Get-WMIObject Win32_LogicalDisk -computername localhost -filter "DriveType=3" | Select SystemName,DeviceID,VolumeName,@{Name="size(GB)";Expression={"{0:N1}" -f($_.size/1gb)}},@{Name="freespace(GB)";Expression={"{0:N1}" -f($_.freespace/1gb)}}

Get-WMIObject Win32_LogicalDisk -computername localhost -filter "DriveType=3" | Select SystemName,DeviceID,VolumeName,@{Name="size(GB)"; Expression={"{0:N1}" -f($_.size/1gb)}},@{Name="freespace(GB)";Expression={"{0:N1}" -f($_.freespace/1gb)}} | Out-GridView