Install gnome-shell-extension-hard-disk-led by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-shell-extension-hard-disk-led
Description:
Shows harddisk activity (IO speed read/write and LED) in GNOME Shell
Many new laptops and some tiny computers do not have hard disk LEDs. . This extension ads an indicator to GNOME Shell that can either show read/write speeds or LED lights to indicate activity.
Homepage: https://github.com/biji/harddiskled
Version: 19-1
Section: universe/gnome