---
id: freeing-space.what-does-clear-system-and-log-clutter-remove
url: https://storagestudio.us/faq/freeing-space/what-does-clear-system-and-log-clutter-remove
category: "Freeing up space"
subcategory: "One-tap clean-up (Run Tuhi)"
question: "What does the \"Clear system & log clutter\" step delete?"
alt_questions:
  - "Is it safe to delete crash reports on a Mac?"
  - "Tuhi clear system and log clutter"
  - "Does Storage Studio delete the Quick Look thumbnail cache?"
  - "What are diagnostic reports and can they go?"
  - "System clutter cleanup Mac"
short_answer: "It removes diagnostic and crash reports and the Quick Look thumbnail cache. Your documents aren't affected and previews regenerate when needed — send any crash report you need before cleaning."
tags: ["logs", "crash reports", "run tuhi", "quick look"]
related: ["https://storagestudio.us/faq/freeing-space/what-does-clear-developer-and-package-caches-remove", "https://storagestudio.us/faq/freeing-space/why-does-the-number-of-tuhi-steps-change"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What does the "Clear system & log clutter" step delete?

It clears diagnostic and crash reports and the Quick Look thumbnail cache. These are records and previews your Mac and your apps create automatically; removing them doesn't affect your documents, and the thumbnails are simply regenerated the next time you preview a file.

Like the other clear-up steps, it's only added to a Run Tuhi plan when there's enough there to be worth doing.

If you're sending a crash report to an app's developer, do that before running a clean-up, because the report may be removed. See [why the step count changes](https://storagestudio.us/faq/freeing-space/why-does-the-number-of-tuhi-steps-change).