If you are on an Ubuntu based system, you can get it with:
sudo apt-get install ncdu
To run it, simply write ncdu in the command line. You will see a lightning fast interface showing you all the memory hogs you have, ordered by size.
Simply navigate your drive with the arrow keys, press d to delete the hogs, and when you are finished, simply click q to quit.
You will find all those massive deep learning models taking up many gigabytes of your storage, plus many other things you probably forgot you had.
It is really a refreshingly simple, effective, and easy to use tool. Absolutely recommended.