Genuinely the only way I use du is like this:

  du -sh *

which shows total disk usage for every file and folder in the current directory. I've actually aliased it as `dush` because I use it so often.

Bonus tip: if you're using btrfs, it has a built-in du that keeps track of cow statistics, so you can see which files/folders are deduped and which aren't. It's invoked with

  btrfs filesystem du -s *

or (because the btrfs binary understands abbreviations)

  btrfs fi du -s *

Thanks. Will try it in details. Currently, it is taking like really forever to scan my bunchs of old school hard drives! du options are easy to remember, ergonomy first^ May I suggest a good one to remember `ls -ltrapR` <- It always kill anyone aside ;)