My hard drive appears to have issues. The size, amount used and the amount left does not add up

My hard drive will not download any more files from the iCloud. Even though the had drive has more than enough room.

The capacity is about 1 TB

It reports to have about 460 GB remaining

But it reports to have used about 832 GB.


Does not make sense. See the hard drive info report attached.

What should I do?

MacBook Pro 13″, macOS 10.14

Posted on Mar 7, 2024 9:52 PM

Reply
Question marked as Top-ranking reply

Posted on Mar 9, 2024 9:59 PM

EricGAnderson wrote:

Apparently the MacBook stores snapshots that it will write out to the time machine when it’s reconnected. That was taking up a lot of space. I’m not so sure that’s a practical idea but that’s what apparently happens.

If you read the post I linked previously explaining macOS storage, it did include mention of APFS snapshots.


Time Machine backups allow you to find multiple older copies & revisions of your files. This is extremely useful in case you made a catastrophic edit a week ago. As long as your external drive is large enough, you will still have that older revision of the file available to you in the TM backup. Some backup software will only keep the most recent copy of the files, so if you would be unable to recover the older copy. However, this extra functionality does have a price, it requires more storage on the backup drive.


Why am I mentioning all that? Well, that is the reason for multiple APFS TM snapshots being stored on your main boot drive since you have not been backing up to the external TM backup drive. TM is keeping all those changes in the backup snapshots for you so you still have access to those other revisions of your files in case you make a catastrophic edit, or you accidentally delete a file. Plus it allows TM to later move those snapshots to your TM backup drive when you finally connect the TM drive again.


Usually APFS snapshots are not an issue except when you are deleting a large amount of data and running out of Free storage space. If you have a large number of APFS snapshots and make a lot of changes to existing files, then that can possibly consume more data than it would seem.


You still have about 150 GB of Free storage space so you can still use it normally, but just don't do anything which would use up lots of storage space (video editing, etc.) until you transfer those Time Machine backups to your external drive. Completely running out of Free storage space will stop macOS from working and even prevent you from deleting any files to make more room due to how the APFS file system works (unless Apple has changed it to allow a built-in buffer). You want to make sure you keep at least 20 GB+ of Free storage space at all times for the basic operation of macOS.


Similar questions

4 replies
Question marked as Top-ranking reply

Mar 9, 2024 9:59 PM in response to EricGAnderson

EricGAnderson wrote:

Apparently the MacBook stores snapshots that it will write out to the time machine when it’s reconnected. That was taking up a lot of space. I’m not so sure that’s a practical idea but that’s what apparently happens.

If you read the post I linked previously explaining macOS storage, it did include mention of APFS snapshots.


Time Machine backups allow you to find multiple older copies & revisions of your files. This is extremely useful in case you made a catastrophic edit a week ago. As long as your external drive is large enough, you will still have that older revision of the file available to you in the TM backup. Some backup software will only keep the most recent copy of the files, so if you would be unable to recover the older copy. However, this extra functionality does have a price, it requires more storage on the backup drive.


Why am I mentioning all that? Well, that is the reason for multiple APFS TM snapshots being stored on your main boot drive since you have not been backing up to the external TM backup drive. TM is keeping all those changes in the backup snapshots for you so you still have access to those other revisions of your files in case you make a catastrophic edit, or you accidentally delete a file. Plus it allows TM to later move those snapshots to your TM backup drive when you finally connect the TM drive again.


Usually APFS snapshots are not an issue except when you are deleting a large amount of data and running out of Free storage space. If you have a large number of APFS snapshots and make a lot of changes to existing files, then that can possibly consume more data than it would seem.


You still have about 150 GB of Free storage space so you can still use it normally, but just don't do anything which would use up lots of storage space (video editing, etc.) until you transfer those Time Machine backups to your external drive. Completely running out of Free storage space will stop macOS from working and even prevent you from deleting any files to make more room due to how the APFS file system works (unless Apple has changed it to allow a built-in buffer). You want to make sure you keep at least 20 GB+ of Free storage space at all times for the basic operation of macOS.


Mar 9, 2024 7:06 PM in response to EricGAnderson

As @Ronasara mentions you need to look at the Free space value listed in Disk Utility. It is very unfortunate that Apple uses the "Available" space value everywhere within macOS since it is very misleading and does not mean that the "Available" space can be used at this time. Your screenshot is showing "Purgeable" space being 302.21 GB. This means you have just 154.88 GB of Free storage space.


See my other post here for a more detailed explanation:

macOS Storage Explained -- hwtech - Apple Community


Mar 9, 2024 8:52 PM in response to EricGAnderson

Couple things…

My Internet connection at my condo here is very sketchy right now. Apparently there’s a problem in speed. It ranges from about a couple megabytes per second to 70 MB per second. AT&T is coming Monday to check it out.

I contacted Apple support and they noticed that I did not have my time machine drive connected. It’s at home.

Apparently the MacBook stores snapshots that it will write out to the time machine when it’s reconnected. That was taking up a lot of space. I’m not so sure that’s a practical idea but that’s what apparently happens.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

My hard drive appears to have issues. The size, amount used and the amount left does not add up

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.