Activity Indicator provides you with tray HDD/USB drive activity monitoring as well as the ability to use the keyboard LEDs.
Activity Indicator is meant to be a simple to use program for indicating any HDD activity right from the system tray. It does include advanced logging capabilities that can be utilized. The interface is simple to navigate and use allowing you for efficient drive logging. Activity Indicator supports the ability to be run from multiple instances which provides the benefit of using it for unlimited drives.
Activity Indicator allows mild visual customization for the tray indicator like multiple icons, and a slider to change the cursor's blink intensity. You can also use Activity Indicator for connected USBs and activity can be displayed via the scroll, caps, and number lock keyboard lights.