# Safety labels: Safe to remove, Review first and Your data

> What MoreRoom’s safety labels mean, how its rules recognise space hogs, what comes back on its own, and why some items can’t be removed.

- URL: https://moreroom.app/support/safety-labels
- Topic: Freeing up space
- Updated: 2026-10-17
- Publisher: MoreRoom (Yando Pte. Ltd.) — https://moreroom.app

## In short

- Safe to remove: rebuilt automatically when needed (caches, build files…). Review first: may hold something you care about — look inside before removing it.
- Your data: your own files, such as photo libraries or virtual machines. MoreRoom shows them but never moves them to the Trash.
- Labels come from about 250 rules that recognise well-known folders and files. They update on their own, signed by MoreRoom.

## The three labels

MoreRoom recognises well-known space consumers — Xcode simulators, npm caches, local AI models, Final Cut render files, app leftovers and many more — and gives each one a label, with a short explanation in plain language.

| Label | Means | What MoreRoom lets you do |
|---|---|---|
| **Safe to remove** | Rebuilt automatically when it’s needed again: caches, build products, downloaded installers… Removing it costs at most a little time later. | Move it to the Trash (or have its tool remove it), alone or with **Add All Safe Items** (Pro). |
| **Review first** | Might hold something you care about: simulators with test data, other Xcode versions, language toolchains, downloaded models, games. | Look inside (**Reveal in Finder**, Quick Look), then remove it if you don’t need it. Never added by **Add All Safe Items**. |
| **Your data** | Your own files: Photos and Final Cut Pro libraries, virtual machines, Mail and Messages data, very large videos… | Nothing: MoreRoom shows how big it is, but the **Move to Trash** button is disabled. |

Items with no label are simply files and folders MoreRoom doesn’t specifically know. You can still remove them yourself, one at a time — they go to the Trash, with Undo.

## Where you see them

- In **Free Up Space** and the **Smart Views**, next to each group of items.
- In the inspector, under the item’s size, with the explanation.
- In the **List** view, in the last column.
- In the Collector’s review sheet, as a coloured dot next to each item.

## “It comes back”

The explanation often says whether an item comes back. A cache that comes back isn’t a reason to keep it — it means removing it is harmless, but the space will be used again over time. [Storage Weather](https://moreroom.app/support/storage-weather) shows which folders grow back fastest.

## Items removed by their own tool

Some items are best removed by the tool that created them — for example iOS simulators (`xcrun simctl`), Homebrew downloads (`brew cleanup`), npm’s cache or Docker data. For those, the inspector’s button reads **Remove with** the tool’s name, and MoreRoom runs the tool’s official command instead of moving files around.

Commands are taken from a fixed list built into the app. Some of them delete for good: they’re marked **Permanent** in the review sheet, and they can’t be undone from MoreRoom. See [Remove items safely](https://moreroom.app/support/remove-items-undo).

## Items you can’t remove from MoreRoom

A few items show their label but no working **Move to Trash** button. Hover over the button to see why:

- **Your data** — offloading it to an external drive is coming in a future version;
- an item that **must be removed from its own app** (the Logic Pro sound library from Logic, games from Steam, models from LM Studio…), with a hint telling you where;
- space that **macOS manages itself**, such as the swap file and sleep image, the Spotlight index or a downloaded macOS update.

## Where the rules come from

The rules are written and checked by the MoreRoom team. A copy ships inside the app, and MoreRoom checks once a day for a newer version, which must be signed by MoreRoom to be accepted. A rule update can add or change rules and their explanations; it can never make MoreRoom run something new. See [Privacy and security](https://moreroom.app/support/privacy-security).

Want to know about a specific folder? Our [“Is it safe to delete?” directory](https://moreroom.app/folders) explains each one.

## Related articles

- [Remove items safely: the Trash, the Collector and Undo](https://moreroom.app/support/remove-items-undo.md)
- [Free Up Space and goal mode](https://moreroom.app/support/free-up-space-goal-mode.md)
- [An item can’t be removed, or was skipped](https://moreroom.app/support/item-cannot-be-removed.md)
- [Privacy and security: what MoreRoom reads and sends](https://moreroom.app/support/privacy-security.md)

## Still need help?

Write to us: a real person reads every message and answers within 2 business days. https://moreroom.app/contact