How do I find my screenshot directory (I already changed it)
If you've changed the location, then
defaults read com.apple.screencapture location
will show you.

If you haven't changed it, i.e. it's still set to the default Desktop &amp; has never been redirected, it will error with
The domain/default pair of (/Users/[user]/Library/Preferences/com.apple.screencapture, location) does not exist