#get server list
$servers = @("localhost")

#this can come from a file instead of hardcoding
#the servers
#servers = Get-Content <filename>

Get-WmiObject -ComputerName $servers -Class Win32_Volume |
ForEach-Object {
   $drive = $_
   $item  = [PSCustomObject] @{
      Name = $drive.Name
      DeviceType = switch ($drive.DriveType)
                   {
                    0 {"Unknown"}
                    1 {"No Root Directory"}
                    2 {"Removable Disk"}
                    3 {"Local Disk"}
                    4 {"Network Drive"}
                    5 {"Compact Disk"}
                    6 {"RAM"}
                   }
      SizeGB = "{0:N2}" -f ($drive.Capacity/1GB)
      FreeSpaceGB = "{0:N2...