Freeing up space · One-tap clean-up (Run Tuhi)
What does "Reviewing and optimising the plan" mean when I start Run Tuhi?
Short answer: It's the planning step at the start of a Run Tuhi clean-up: Storage Studio measures what's worth clearing on your Mac and builds the step list. No files are touched during it.
It's the short planning beat at the start of every run. Storage Studio is measuring what's actually there to clear on your Mac and deciding which steps are worth doing — no files have been touched yet.
Once planning finishes, the run moves on to the safe steps in order and the live checklist shows each one as it starts and completes. Planning normally takes a moment; on a very busy Mac it can take a little longer because Storage Studio deliberately yields to your own work.
If you want to stop before anything happens, this is a safe point to do it. See why the step count changes.