The TotalSize property returns the total size of the specified drive in bytes.
<html> <script language="JScript"> <!-- var drivePath = "C:"; var fileSysObj = new ActiveXObject("Scripting.FileSystemObject"); var drive = fileSysObj.GetDrive(fileSysObj.GetDriveName(drivePath)); document.write("Drive ",drivePath," is ",drive.TotalSize," bytes."); --> </script> </html>