Free Disk Space - Version 2.01b Resides in your system tray and monitors the amount of free disk space on all of your hard drives. Double-click the icon to invoke an attractive dialog that graphically displays total and free space for each drive. The chart design is highly configurable. You can also set an alarm that provides dialog box, sound or mail notification when free space falls below a certain level. Just set the available slider control to determine the alarm level. This utility is easy to use and its free.