Performance & battery · Staying light on your Mac
Does keeping the Storage Profile window open use more resources?
Short answer: A little. Storage Profile draws live charts and analyses your cloud accounts while it's open; closing it stops both. Results are kept, and Light mode gives a static view if you leave it open.
A little, yes — it's Storage Studio's busiest window. While it's open it can draw live charts (in the Rich and Good levels), keep its own footprint graph updating, and analyse your connected cloud accounts in the background.
Closing it stops the cloud analysis straight away, and the live drawing stops with it. Results are kept, so reopening is quick — cloud-account results are cached for a day.
If you like to keep it open all day, choose Light from its performance menu for a static view. See how to change the mode.