Param([string]$ComputerName="$env:computername")

clear;

function GetDrivetypeName([int]$DriveType) {
   switch($DriveType) {
	 	0  {'Unknown'} 
		1  {'No Root Directory'}
		2  {'Removable Disk'}
		3  {'Local Disk'}	
		4  {'Network Drive'}	
		5  {'Compact Disk'}
		6  {'RAM Disk'}
		default {'?'}
	}
}

get-wmiobject -Computername $ComputerName win32_volume |
    format-table Driveletter,`
                 Label,`
				 @{Name="DriveType"; Expression = {GetDrivetypeName($_.DriveType)}},`
                 @{Name="Capacity [GB]"; Expression = {[Math]::Round($_.Capacity/1024/1024/1024, 1)}},`
                 @{Name="Free Space [GB]"; Expression = {[Math]::Round($_.FreeSpace/1024/1024/1024, 1)}},`
                 @{Name="Free Space [%]"; Expression = {[Math]::Round(($_.FreeSpace/$_.Capacity)*100)}}`
                 -autosize

$d = New-Object -typename System.IO.DriveInfo -argumentlist "C:"
$d

foreach($server in $servers)
{
	# Get fixed drive info
	 $disks = Get-WmiObject -ComputerName $server -Class Win32_LogicalDisk -Filter "DriveType = 3";
	foreach($disk in $disks)
	{
		$deviceID = $disk.DeviceID;
		[float]$size = $disk.Size;
		[float]$freespace = $disk.FreeSpace;

....