Why Is iCloud Drive Taking So Much Space on Mac

What Causes This?

iCloud Drive can take up a lot of space on a Mac because it keeps local copies of your cloud files so they open faster and stay available offline. If Optimize Mac Storage is turned off, or if you recently downloaded large folders from iCloud, those files may remain stored on your Mac even though they also exist in the cloud. Cached data, old sync leftovers, and files inside Desktop and Documents syncing can also make iCloud Drive storage usage look much larger than expected.

Common Symptoms

• Your Mac says startup disk space is almost full
• iCloud Drive appears to use tens or hundreds of GB in storage settings
• Large files in Desktop or Documents are syncing through iCloud without you realizing it
• Finder shows cloud files as downloaded locally instead of online-only
• Your Mac feels slower during syncing or while low on free space

How to Fix It Manually

1. Check how much space iCloud Drive is using

   1. Click the Apple menu > System Settings.
   2. Go to General > Storage.
   3. Review the storage breakdown and look for iCloud Drive, Documents, or unusually large file categories.

2. Turn on Optimize Mac Storage

   1. Open Apple menu > System Settings.
   2. Click your Apple ID name at the top, then select iCloud.
   3. Click iCloud Drive.
   4. Make sure Optimize Mac Storage is enabled.

   This lets macOS remove older local copies when space is needed while keeping the files available in iCloud.

3. Remove downloaded local copies of large iCloud files

   1. Open Finder.
   2. Click iCloud Drive in the sidebar.
   3. Look for large folders or files with no cloud icon, which usually means they are stored locally.
   4. Right-click a file or folder and choose Remove Download if available.

   This keeps the file in iCloud but frees the local copy from your Mac.

4. Check Desktop and Documents syncing

   1. Go to System Settings > Apple ID > iCloud > iCloud Drive.
   2. Click Desktop & Documents Folders if shown.
   3. Review whether large files in those folders are being synced to iCloud and stored locally.
   4. Move very large files you do not need in iCloud to another location, such as an external drive.

5. Delete unneeded files from iCloud Drive

   1. In Finder, open iCloud Drive.
   2. Sort by Size to find the biggest items.
   3. Delete files you no longer need, then open Recently Deleted in iCloud if applicable and remove them permanently.

   Deleting files from iCloud Drive removes them from iCloud on all synced devices, so double-check before deleting.

6. Restart your Mac after cleanup

   1. Click the Apple menu > Restart.
   2. After restarting, return to System Settings > General > Storage and check whether free space has increased.

   A restart can help macOS recalculate storage and clear temporary sync data.

Fix It Automatically with Kudu

If iCloud Drive is filling your Mac because of cached data, temporary files, or leftover sync clutter, Kudu can help you clean up the safe junk around it without risking your personal files. It quickly finds temporary files, caches, and other removable storage hogs so you can free space faster than doing it all by hand.

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