We will provide an example of how you can get the size of each folder (known also as directories) in Linux. If you use Windows, then you can download the Ubuntu App and work with it. If you use the Ubuntu App and you want to mount your C drive the command is:
$ cd /mnt/c
If I want to see the used space and the free space of my system I can do it with the following command:
df -h
Now, if I want to get the size of each folder within one folder, I can type:
du -hs * | sort -h -r