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but I'm more of a visual guy who likes colours and an easy UI

I usually suggest that Terminal line because it will show hidden and system files not shown by Omni. But if you prefer to use Omni, you can launch it with the sudo command below and then it will show all hidden and system files like the Terminal command I use.

Code:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
 
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Run the command below in Terminal and give it a few minutes to complete, then tell us the output.

Code:
sudo du -d 1 -x -c -g /

This will show the base folders space used in GB, including system and hidden files.
[doublepost=1549992200][/doublepost]It says 111gb in the library but i still can't locate the files
[doublepost=1549992410][/doublepost]As you can see only 20gb in the library, which is about right!
i did run not disk sweeper but an equivalent and showed me all of my files but still over half my drive with unknown data
 

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How often are you connected to a backup drive so time machine can run ?

I had issues with time machine eating up my local drive's space when there was an issue with the backup (temporary snapshot files were created and not deleted).
 
It says 111gb in the library but i still can't locate the files
You need to wait longer for it to finish. You will know it is done when there is a "Total" shown at the bottom.

Also run this to show contents of the /Library.

Code:
sudo du -d 1 -x -c -g /Library

Edit: You are looking in the users Library and not the root /Library folder. Two different folders.
 
Run the omni disk sweeper and the results are below, these numbers do not add up to 133gb
 

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How often are you connected to a backup drive so time machine can run ?

I had issues with time machine eating up my local drive's space when there was an issue with the backup (temporary snapshot files were created and not deleted).
I disabled time machine due to it wanting 1.5 tb of space for about 450gb of data, i have also deleted all the local backups through the terminal!
 
Run the omni disk sweeper and the results are below, these numbers do not add up to 133gb

Code:
sudo du -d 1 -x -c -g /Library

You need to run this command I suggested. You can see where that command shows 111GB in /Library and Omni only shows 2.8GB, since it cannot see everything.

Screen Shot 2019-02-12 at 9.34.37 AM.png
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I disabled time machine due to it wanting 1.5 tb of space for about 450gb of data, i have also deleted all the local backups through the terminal!

I would still click about this mac and then click on the storage tab to get a quick graphical view of what is using your storage.

One other thing which I hope it isn't is the file structure might be screwed up on your SSD and your computer is reporting an erroneous number.

I had that happen to my SSD and disk utility couldn't fix it. Note - If you run disk utility, it will probably take a very long time to run. Let it run to completion.

I ended up erasing my drive and loading back an older time machine backup.
 
I would still click about this mac and then click on the storage tab to get a quick graphical view of what is using your storage.

One other thing which I hope it isn't is the file structure might be screwed up on your SSD and your computer is reporting an erroneous number.

I had that happen to my SSD and disk utility couldn't fix it. Note - If you run disk utility, it will probably take a very long time to run. Let it run to completion.

I ended up erasing my drive and loading back an older time machine backup.
Thanks, i am putting new install on this drive so i can sell the mac pro as i have just got a new mac mini and wanted to see how i can prevent this from happening again, seems i had loads of stuff not showing up like in the componet (logic pro) folder after i had removed most of the programs, getiing much better figures now so thanks to all!
[doublepost=1549993954][/doublepost]
Code:
sudo du -d 1 -x -c -g /Library

You need to run this command I suggested. You can see where that command shows 111GB in /Library and Omni only shows 2.8GB, since it cannot see everything.

View attachment 821484 View attachment 821485
Thank you very much, that is much more informative!
 

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Thanks, i am putting new install on this drive so i can sell the mac pro as i have just got a new mac mini and wanted to see how i can prevent this from happening again, seems i had loads of stuff not showing up like in the componet (logic pro) folder after i had removed most of the programs, getiing much better figures now so thanks to all!

Best of luck with the new Mini !!!
 
I have a MBP mid 2014, 256gb, system is 120gb and when I use the:
Code:
sudo du -d 1 -x -c -g /
I only see "107 total" so over a 130 gb missing.

When i try to use the:
Code:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper

I get this in terminal:
Code:
OCCCrashCatcher: Not enabling crash catching since we're connected to a tty (and thus presumably in lldb)

2019-02-14 01:08:49.301 OmniDiskSweeper[8192:83818] Failed to connect (destroyMenuItem) outlet from (ODSController) to (NSMenuItem): missing setter or instance variable

2019-02-14 01:08:49.517 OmniDiskSweeper[8192:83818] Automatic software update check failed due to XPC service failure: {

    code = 2;

    domain = "com.omnigroup.framework.OmniSoftwareUpdate.ErrorDomain";

    userInfo =     {

        NSLocalizedDescription = "Unable to fetch software update information.";

        NSLocalizedFailureReason = "Check operation failed.";

        NSUnderlyingError =         {

            code = 12;

            domain = "com.omnigroup.framework.OmniSoftwareUpdate.ErrorDomain";

            userInfo =             {

                NSLocalizedDescription = "Error fetching software update information.";

                NSLocalizedFailureReason = "The background software update service failed.";

                NSLocalizedRecoverySuggestion = "Please try again later or contact us to let us know this is broken.";

            };

        };

    };

}

When I run ods, it shows me 150gb, what can i try next?

The hidden files dont show up anywhere...
 
I have a MBP mid 2014, 256gb, system is 120gb and when I use the:
Code:
sudo du -d 1 -x -c -g /
I only see "107 total" so over a 130 gb missing.

When i try to use the:
Code:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper

I get this in terminal:
Code:
OCCCrashCatcher: Not enabling crash catching since we're connected to a tty (and thus presumably in lldb)

2019-02-14 01:08:49.301 OmniDiskSweeper[8192:83818] Failed to connect (destroyMenuItem) outlet from (ODSController) to (NSMenuItem): missing setter or instance variable

2019-02-14 01:08:49.517 OmniDiskSweeper[8192:83818] Automatic software update check failed due to XPC service failure: {

    code = 2;

    domain = "com.omnigroup.framework.OmniSoftwareUpdate.ErrorDomain";

    userInfo =     {

        NSLocalizedDescription = "Unable to fetch software update information.";

        NSLocalizedFailureReason = "Check operation failed.";

        NSUnderlyingError =         {

            code = 12;

            domain = "com.omnigroup.framework.OmniSoftwareUpdate.ErrorDomain";

            userInfo =             {

                NSLocalizedDescription = "Error fetching software update information.";

                NSLocalizedFailureReason = "The background software update service failed.";

                NSLocalizedRecoverySuggestion = "Please try again later or contact us to let us know this is broken.";

            };

        };

    };

}

When I run ods, it shows me 150gb, what can i try next?

The hidden files dont show up anywhere...
I was able to locate the files with the above terminal code
Code:
sudo du -d 1 -x -c -g /Library
 
Skärmavbild 2019-02-14 kl. 18.13.21.png
Skärmavbild 2019-02-14 kl. 18.13.26.png



This is what I get when i use those commands, cant find anything close to 100gb

It has increesed from 120 to 127gb since yesterday, have no clue what to do, tried with omni and other programs but I dont find ****...



Skärmavbild 2019-02-14 kl. 18.19.22.png
 
Well there is 53gb in movies, 18 in the trash and 16 in documents, thats 88gb right there!
I get what you get just different numbers, your data however looks about right!
 
Confirm for me, what do you get with this command?

Code:
sudo du -d 1 -x -c -g /

I get this:

Skärmavbild 2019-02-14 kl. 18.31.07.png

[doublepost=1550166974][/doublepost]
Well there is 53gb in movies, 18 in the trash and 16 in documents, thats 88gb right there!
I get what you get just different numbers, your data however looks about right!

Yes i have about 100gb, and 130gb that i cant find
 
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