---
id: privacy-safety.does-the-space-watch-guess-which-app-used-space
url: https://storagestudio.us/faq/privacy-safety/does-the-space-watch-guess-which-app-used-space
category: "Privacy & safety"
subcategory: "App trust, updates and security"
question: "When Storage Studio says an app used my space, could it be guessing?"
alt_questions:
  - "How does Storage Studio know which app filled my disk?"
  - "Where did my space go notice names the wrong app"
  - "storage studio space watch accuracy"
  - "Does the low-space warning invent causes?"
short_answer: "It tells you how sure it is: it names an app only when it can identify one, hedges when it's unsure, and says plainly when it can't tell — it never invents a cause. Its own jobs are named as its own."
tags: ["space watch", "notices", "accuracy"]
related: ["https://storagestudio.us/faq/privacy-safety/are-the-space-saved-numbers-accurate", "https://storagestudio.us/faq/privacy-safety/can-i-see-a-record-of-what-storage-studio-did"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# When Storage Studio says an app used my space, could it be guessing?

It tells you how sure it is. A notice names the app when it can identify one, hedges when a folder only **looks** like it belongs to an app, and says plainly when it couldn't tell — it never invents a name to fill the gap.

If free space moved because one of Storage Studio's own jobs was running, the notice says so. You can mark a source as expected so it isn't mentioned again. All of this is worked out on your Mac.