# How to check free space and eject drives in NotchStar > The Disk tab's Overview lists every mounted drive with its free space, and shows an eject button for external disks. Canonical: https://www.notchstar.com/help/check-free-space-and-eject-drives-notchstar/ Last updated: 2026-11-04 Published 2026-11-04. To see how much space is left on your Mac, hover over the notch, open the **Disk** tab and stay on **Overview**. It lists every mounted drive with its name, a bar, and a line such as 180 GB free of 500 GB. No scan is needed for this part. ## What you see - One row for each drive, including your Mac's disk and any external or removable drive that is mounted. - Hidden system volumes are left out. - The figure for free space is what macOS calls available for important usage. That counts space it can reclaim, such as purgeable files, so it can be higher than the plain figure `df` prints in Terminal. ## Eject a drive External, removable and non internal drives show a small eject button on their row. Press it and NotchStar asks macOS to unmount and eject the drive. Your startup disk never shows the button. If macOS cannot eject, because a file on the drive is open, nothing happens. Close what is using the drive and press the button again. ## What to do next Overview also holds the scan for caches, logs, Xcode data and old downloads, and that starts only when you press Scan. To see what is using the space, go to the Space section: [find the biggest folders](https://www.notchstar.com/help/find-biggest-folders-notchstar/). For the ring in the System tab, read [what the disk gauge shows](https://www.notchstar.com/help/disk-gauge-in-notchstar/). The [Disk feature page](https://www.notchstar.com/features/disk/) lists every section, and [what the scan finds](https://www.notchstar.com/help/what-notchstar-disk-scan-finds/) covers the cleanup groups. ## Quick answers. ### Does the free figure include purgeable space? Yes. It uses the capacity macOS reports as available for important usage, which includes space the system can reclaim. ## Keep reading. - [Disk space, duplicates, apps and cleanup](https://www.notchstar.com/features/disk/): See free space, find big folders, duplicates and app leftovers, compress media and clean caches from your Mac notch. Everything goes to the Trash. - [What the disk gauge in NotchStar shows](https://www.notchstar.com/help/disk-gauge-in-notchstar/): The disk ring in the System tab shows how full your startup volume is, counting space macOS can reclaim as free, so it can differ from Terminal. - [What the NotchStar Disk scan finds](https://www.notchstar.com/help/what-notchstar-disk-scan-finds/): The Overview scan finds app caches, logs, Xcode build data and downloads untouched for 90 days. It lists them and removes nothing until you choose. - [How to find the biggest folders on your Mac with NotchStar](https://www.notchstar.com/help/find-biggest-folders-notchstar/): The Space section measures your home folder and ranks folders by size. Click one to look inside, show it in Finder, or move it to the Trash. ## More in Disk and storage. - [What the NotchStar Disk scan finds](https://www.notchstar.com/help/what-notchstar-disk-scan-finds/): The Overview scan finds app caches, logs, Xcode build data and downloads untouched for 90 days. It lists them and removes nothing until you choose. - [Is NotchStar Disk cleanup safe?](https://www.notchstar.com/help/is-notchstar-disk-cleanup-safe/): Disk only moves things to the Trash, only inside your home folder and app bundles in /Applications. It refuses the home folder itself and system paths. - [How the NotchStar Disk Trash step works](https://www.notchstar.com/help/notchstar-disk-trash-not-permanent-delete/): Disk moves items to the Trash and never deletes for good. Space only comes back when you empty the Trash yourself in Finder. - [How NotchStar finds duplicate files](https://www.notchstar.com/help/find-duplicate-files-notchstar/): Duplicates compares file contents, not names, across six folders. It skips files under 1 MB and hard links, and keeps the oldest copy of each set. - [How to remove an app and its leftovers in NotchStar](https://www.notchstar.com/help/remove-app-leftovers-notchstar/): The Apps section lists apps with the caches, preferences and logs they leave in Library. Remove sends the app and those files to the Trash. - [How to compress large videos with NotchStar](https://www.notchstar.com/help/compress-large-videos-notchstar/): Compress finds photos over 2 MB and videos over 50 MB, recompresses them, and keeps the result only if it is under 90 percent of the original size.