youtube.com/watch?v=ircl1OVEdaM - 16:13 is bugged... A file or Folder that is empty, ie 0 bytes, will have the graph show as full-size instead of nothing.. Likely because of an inverse logic flaw to prevent division by 0 and setting the default to full instead of empty.
There are no 0 byte files or folders in the video at 16:13
0 byte files have empty bar graphs when I try here: