Check Free Disk Space - VBScript

strComputer = "." 
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\CIMV2") 
Set colItems = objWMIService.ExecQuery( _
    "SELECT * FROM Win32_LogicalDisk WHERE DeviceID = 'C:'",,48) 
For Each objItem in colItems 
    Bytes = objItem.FreeSpace


If Bytes >= 1073741824 Then
SetBytes = Round(FormatNumber(Bytes / 1024 / 1024 / 1024, 2), 0) & " GB"
ElseIf Bytes >= 1048576 Then
SetBytes = Round(FormatNumber(Bytes / 1024 / 1024, 2), 0) & " MB"
ElseIf Bytes >= 1024 Then
SetBytes = Round(FormatNumber(Bytes / 1024, 2), 0) & " KB"
ElseIf Bytes < 1024 Then
SetBytes = Bytes & " Bytes"
Else
SetBytes = "0 Bytes"
End If


Wscript.Echo "OUTPUT = " & SetBytes


Next