How to find large files on a Mac, safely

The quickest way to find large files on a Mac is Storage in System Settings: click the info button next to Documents, click Large Files, and sort by Size. Click Show in Finder to look at a file first, and copy anything you want to keep to an external drive or iCloud. Then select the file and click Delete, or drag it to the Trash in Finder and empty the Trash.

By the Scope teamUpdated 4 min read

How do I see my Mac’s largest files?

  1. Choose Apple menu > System Settings, click General in the sidebar, then click Storage.
  2. Click the info button (ⓘ) next to Documents.
  3. Click Large Files. Click Size near the top of the list to sort, biggest first.
Storage in System Settings, with Documents at 498.31 GB and its info button
Documents takes the most space here: 498.31 GB. Illustration with made-up readings.
Storage's Documents view, Large Files sorted by size: My Cat Staring at a Wall 4K.mov at 48.2 GB first
Three files take 74.8 GB, and two of them are videos. Illustration with made-up readings.

Click Downloads to see what you’ve downloaded, or File Browser to see how much space each folder uses.

How do I delete a large file safely?

  1. Look at it first. Select the file and click Show in Finder. You can also select a file in Finder and press Command-I to see its size and where it is.
  2. Keep what you need. Copy files you want to keep to an external drive, or store them in iCloud, before deleting them from your Mac.
  3. Delete it. In Storage, select the file, click Delete, then confirm. In Finder, drag it to the Trash instead if you’d like a way back until you empty it.
  4. Empty the Trash. Files you drag to the Trash still take up space until you empty it.

Which large files are usually safe to remove?

Files you made or downloaded and don’t need any more are the ones to look at:

  • Videos and exports you’ve already shared or backed up.
  • Installers in Downloads, such as disk images (.dmg), once the app is installed.
  • Old downloads you’ve already used.

Leave alone anything you don’t recognize, and anything macOS keeps for itself.

Can macOS free up space for me?

Yes. Storage’s recommendations, at the top of Storage, offer three:

  • Store in iCloud: keeps your files in iCloud, and only recent ones on your Mac when space is needed.
  • Optimize Storage: removes movies and TV shows you’ve already watched.
  • Empty Trash automatically: erases items that have been in the Trash for more than 30 days.

Questions people also ask

Why didn’t deleting files free up space?

Deleted files stay in the Trash, and they take up space until you empty it.

Is it safe to delete files from the Downloads folder?

Usually, if you’ve already used them. Open a file first if you’re not sure what it is, and keep installers for apps you might need to reinstall.

What is System Data, and can I delete it?

System Data holds files no other Storage category claims, such as caches, logs and temporary files. macOS manages it, so you can’t delete it directly. What is System Data on a Mac? explains what you can do.

Scope for Mac · Free, coming to the Mac App Store

How Scope helps

Scope is a free Mac menu bar app that lists the largest files in your home folder, or on any drive you allow, with Show in Finder for each one. It never opens, moves or deletes your files, so you can look safely and decide for yourself.

In your menu bar

Scope in a Mac’s menu bar: the Scope icon and Drive, with Mac at 91%
Scope’s Drive panel, opened from the menu bar: Macintosh HD 91.0% used with 89.52 GB available, and live read and write speeds
Scope sits in your menu bar, and one click opens its Drive panel.

Largest files

Largest files shows three files at first, then ten more at a time, each with Show in Finder. It’s in Scope Free; Scope asks once before it reads your home folder or another drive.

Scope’s Drive panel: Macintosh HD 91.0% used, 89.52 GB available, Low spaceScope’s Largest files in your home folder: My Cat Staring at a Wall 4K.mov 48.2 GB, macOS Installer.dmg 14.8 GB, Drone Footage 4K.mov 11.8 GB, each with Show in Finder
The same three files, beside how full the drive is.

Which file filled it

When a drive stays past your limit (90% unless you change it), Scope shows the alert on its overview. Scope Pro adds a red + on its menu bar icon and names the largest file added since free space began to fall.

Scope Pro's alert "Macintosh HD is 91% full", naming Drone Footage 4K.mov, 11.8 GB, as the largest file added since free space began to fall
Scope Pro When a drive fills up, Scope Pro names the file behind it.
Everything this part of Scope showsMac storage monitor: disk space and largest files

Try it here

The real Scope, working, right in this page.

Click any item in the menu bar, or a card inside, as you would on your Mac.

Scope Pro Every menu bar item is shown here. Scope Free keeps one whole item of your choice, with every reading inside.

See what’s filling your own Mac.

Get one email when Scope is on the Mac App Store.

We’ll ask you to confirm first. No tracking, and you can unsubscribe from any email. How we handle your email.

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Sources

Last checked October 17, 2026. Readings, apps and files in the pictures are from a made-up Mac.