Macintosh HD nearly full - numbers don't add up!

Enec0 wrote:

Why do I not have all the numbers? I used three different tools (Transmit / DiskWave / OmniDiskSweeper) to view and calculate all the files on the drive, including the hidden ones. And these numbers don't add up to the used space.

I have been using Macs for 7 years now and never had an issue like that. Never has there been such a mismatch between file sizes and used disk space.

See used and available storage space on your Mac

https://support.apple.com/guide/system-information/see-available-storage-space-syspf9b375b9/10.14/mac/10.15

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

https://support.apple.com/en-us/HT206996

User tip: "Other and What Can I Do About It ?"

https://discussions.apple.com/docs/DOC-5142

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

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

They don't add up because you don't have all the numbers. What matters is what you see in Get Info for the drive.

Get Correct Storage Information

Do not use the information from the Storage section of the About This Mac dialog. Ignore the Storage information as it is typically wrong. To find out the correct information for any disk: Select a Desktop disk icon. Press Command-I to open the Get Info window and look at the topmost panel displayed. You will find the disk information displayed for Capacity, Available, and Used. If you have more than one disk/partition then repeat for each one on your Desktop.

The categories found in the Storage section of About This Mac is simply an arbitrary way of displaying files on your drive. There are no such categories actually on the drive.

You have 310GBs of storage left which is quite a bit as opposed to nearly full. Nearly full is when you have 1GB of space left.