If your PC don’t have a HDD led connected or is out of your sight which blinks when read and write operations carried out on hard drive, Free HDD LED is a freeware utility shows hard drive activity in real-time in the system tray.
Free HDD LED shows all partitions in hard drive and other external hard drives attached to your Computer. Hover your mouse pointer over each partition to know drive space details and file system type. Indicator blinks by default for 50ms, you can change it by right-clicking on its tray icon.
You can hide/minimize Free HDD LED interface to system tray. This app works on Windows XP/Vista/ 7 and .Net framework 2.0 or above must be installed in your Computer for this app to work.