MacBook Pro hard drive full, files missing

Macbook pro os 26.1 I was copying from one external drive to another and suddnely noticed my hard drive almost full. About 300 GB have gone onto it. I cannot find anywhere the files that have suddenly moved onto the hard disk. I searched all files.

MacBook Pro 14″, macOS 26.1

Posted on Nov 22, 2025 2:53 AM

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Question marked as Top-ranking reply

Posted on Nov 22, 2025 7:31 AM

Nick_Macartney wrote:

Macbook pro os 26.1 I was copying from one external drive to another and suddnely noticed my hard drive almost full. About 300 GB have gone onto it. I cannot find anywhere the files that have suddenly moved onto the hard disk. I searched all files.



All Volumes within a  Container share space without penalty—giving and taking as needed:


Trash

Time Machine local backups

Virtual memory

cache memory

tmp files

etc...


reboot the machine, do a Safeboot all effect what is presented in your "System Data"




What Apple used to label "Other" is now labeled "System Data".


Empty your Trash — Delete files and folders on Mac - Apple Support

Delete files and folders on Mac - Apple Support


How to free up storage space on your Mac - Apple Support 

Free up storage space on your Mac - Apple Support


See used and available storage space on your Mac

See used and available storage space on your Mac - Apple Support



Try something like OmniDiskSweeper for a GUI to get a good look at itemized file size and location:


OmniDiskSweeper http://www.omnigroup.com/more

1 reply
Question marked as Top-ranking reply

Nov 22, 2025 7:31 AM in response to Nick_Macartney

Nick_Macartney wrote:

Macbook pro os 26.1 I was copying from one external drive to another and suddnely noticed my hard drive almost full. About 300 GB have gone onto it. I cannot find anywhere the files that have suddenly moved onto the hard disk. I searched all files.



All Volumes within a  Container share space without penalty—giving and taking as needed:


Trash

Time Machine local backups

Virtual memory

cache memory

tmp files

etc...


reboot the machine, do a Safeboot all effect what is presented in your "System Data"




What Apple used to label "Other" is now labeled "System Data".


Empty your Trash — Delete files and folders on Mac - Apple Support

Delete files and folders on Mac - Apple Support


How to free up storage space on your Mac - Apple Support 

Free up storage space on your Mac - Apple Support


See used and available storage space on your Mac

See used and available storage space on your Mac - Apple Support



Try something like OmniDiskSweeper for a GUI to get a good look at itemized file size and location:


OmniDiskSweeper http://www.omnigroup.com/more

MacBook Pro hard drive full, files missing

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