---
id: freeing-space.what-is-whats-using-space
url: https://storagestudio.us/faq/freeing-space/what-is-whats-using-space
category: "Freeing up space"
subcategory: "What's Using Space (Storage Inspector)"
question: "What does the What's Using Space window show me?"
alt_questions:
  - "How do I see what's taking up space on my Mac with Storage Studio?"
  - "What's Using Space window explained"
  - "Find what is filling my disk"
  - "Storage Studio disk usage view"
  - "See biggest folders on Mac Storage Studio"
short_answer: "It's the window that shows what's really on your disk, measured on your Mac: what changed since last time, your biggest folders to any depth, space held by backups, and common quick wins."
tags: ["whats using space", "storage inspector", "disk usage"]
related: ["https://storagestudio.us/faq/freeing-space/is-storage-inspector-the-same-as-whats-using-space", "https://storagestudio.us/faq/freeing-space/what-does-gone-pinned-reclaimed-mean", "https://storagestudio.us/faq/freeing-space/how-do-i-find-the-biggest-folders"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What does the What's Using Space window show me?

What's Using Space is the window that shows what's actually on your disk — measured on your Mac, not estimated. It has four main parts:

- **What changed** — what grew since the last measurement, split into Gone, Pinned and Reclaimed.
- **Biggest on this disk** — your largest folders, which you can drill into to any depth.
- **Space held by backups** — how much your Mac's local snapshots hold and how old it is.
- **Known quick wins** — common caches and leftovers.

Rows Storage Studio can act on have a **Move to fast drive** button, and **Relocated** in the header lists everything already moved. Open it from the **More menu ••• → What's Using Space**. Full detail: [What's Using Space manual](https://storagestudio.us/manual/whats-using-space).