Why are all my snap directories empty even though I have apps installed there?
If I browse to ~/snap all of the directories contained inside are empty. Also, if I ls -a in terminal I get,
intellij-idea-community/current $ sudo ls -la
total 8
But no files?
The snap folder under your home directory is not where snaps are installed. It's simply the confined path tree for where those apps are allowed to read/write user data from (barring any exceptions granted by the user).
The actual snaps are in a different system-wide location, and mounted on yet another location for use.