> I wonder. Is there a way to find out the smallest size file in a directory or sub directory, largest files, then maybe a average file size??? I thought about du but given the number of files I have here, it would be a really HUGE list of files. Could take hours or more too. This is what KDE properties shows.

I'm sure there are more accurate ways but

sudo ls -R / | wc

give you the number of lines returned from the ls command. It's not perfect as there are blank lines in the ls but it's a start.

My desktop machine has about 2.2M files.

Again, there are going to be folks who can tell you how to remove blank lines and other cruft but it's a start.

Only takes a minute to run on my Ryzen 9 5950X. YMMV.