traydisk-150x150 Space on the TrayI have to say that if you feel the need to install this little on your PC, then you probably need a larger hard . Tray DisK Free sits in the System – next to the clock — and it does just one thing, it displays the amount of left on your . If you hover your mouse over the icon there’s a more detailed analysis. Nominally it’s set for your main drive (usually C:) but it can be set to monitor any drive on your PC. The menu option lets you change how frequently the checks the drive, and if you want to have a fiddle with some line switches, you can change the and text colour.