(newbie - just signed up) I am wondering why when I type the ls -l, ls -lh etc, why it gives the size of my Download file as 4 kilobytes when it is actually 20.7 gigabytes when I click properties on the GUI. I have looked at previous questions but did not find an answer to this seeming anomoly. Thanks. The other thing is being a newbie I hope I can find my question post again if there is a reply - not at all certain about this but have ticked the email reply box at least.
When you view that directory in a file explorer, the program assumes you want the total size of files within that directory. You can get this from the command line, too, of course - try
See this post for more info.