The ncdu command can be used to see what is taking up space on your Raspberry Pi hard drive.
My Raspberry Pi is running Raspbian Release 10 Codename Buster and ncdu was already installed.
Start a new terminal session, type ncdu and press enter.
ncdu is fast. On a Raspberry Pi 3 it took approx. two seconds to display the results from /home/pi location. Apart from the speed notice how well the results are displayed.
In the screen shot below the pi-timolo directory is taking up most of the space on my Raspberry Pi.
ncdu has become one of my favourite tools used to maintain the Raspberry Pi. It is easy to use and you don’t need to reach for the man pages or google to use it or decipher its results.
The inspiration for this post came from this post on the Raspberry Pi forum.