blah

$foo = "."
[wmi]"\\$foo\root\cimv2:Win32_LogicalDisk.DeviceID='C:'" | Select-Object __SERVER, deviceid, size, freespace 

 Format output to GB

[wmi]"\\$foo\root\cimv2:Win32_LogicalDisk.DeviceID='C:'" | Select-Object __SERVER, deviceid, `
    @{"Label"="Size GB";Expression={[int]($_.Size/1gb)}}, `
    @{"Label"="Freespace GB";Expression={[int]($_.Freespace/1gb)}}

$strtextfile = Get-Content -Path "C:\Temp\Servers.txt"
foreach ($server in $strtextfile)
{
  $item = [wmi]"\\$server\root\cimv2:Win32_LogicalDisk.DeviceID='C:'" | 
    Select-Object __SERVER, deviceid, `
    @{"Label"="Size GB";Expression={[int]($_.Size/1gb)}}, `
    @{"Label"="Freespace GB";Expression={[int]($_.Freespace/1gb)}}
    #Write-host "Drive $($item.DeviceID) on Computer $server has $($item.freespace)"
    Write-host "Drive $item.DeviceID on Computer $server has $($item.freespace)"
}

$strtextfile = Get-Content -Path "C:\Temp\Servers.txt"
foreach ($server in $strtextfile)
{
  $wmiobject = get-wmiobject -class win32_logicalDisk -Computername $server -filter "Drivetype=3" |
  Select-object DeviceID,freespace,size
  #Get-Wmiobjec returns a collection
  Foreach ($item in $wmiobject)
  {
     Write-host "Drive $($item.DeviceID) on Computer $server has $([int64]($item.freespace/1gb))"
  }
}