MacBook Pro 16" M1 Pro not showing full storage amount

davevidduong wrote:

Nothing has changed I purchased it used from someone and it has been formatted.

https://discussions.apple.com/content/attachment/777720dd-638c-419e-8d4e-766dcf410ce0

Well yes that is your problem—"I purchased it used from someone"

It was not properly prepared for resale...you have an extra Container— which you need to erase and reformat to regain correct disk structure to regain all you available 500GB/SSD of storage:

refer to this link: What to do before you sell, give away, or trade in your Mac

davevidduong wrote:

Just followed the steps and still showing 373GB.

Apparently not...

DiskUtility>View> Show all Devices— you are erasing, reformatting, initializing the parent drive as new. This wipes the drive to zero and you are starting over...

That has to be done from Internet Recovery.

If you can not sort through this, the alternative is:

Revive or restore a Mac with Apple silicon using Apple Configurator - Apple Support

davevidduong wrote:

It shows capacity 373.29GB, Available: 339.68GB (1.99GB purgeable), Used: 29.58GB.

You do not say old issue, new issue, what changed(?)

Lets see the details from the Terminal.app copy and paste:

diskutil list internal

It was "improperly" formatted for what you want now. To reclaim the space you must once again reformat the disk and this time get it all. The only way that can be accomplished is to format from "outside" the operating system. and even then, you have to do all the tasks to get all the disk.

One way of doing this is to boot from a bootable flash drive ... has the OS installed on it. That way, you're outside the OS and you can do pretty much anything to the disk you want. Including installation of the OS.

davevidduong wrote:

Hello so I'm having problems with my storage not showing the full storage. I know it won't show me the full 512GB but I found mine weird when it shows 373GB. I was wondering why it is like this? I have already formatted it and it still goes to 373GB. In the settings it shows that the max storage for this MacBook is 500GB. I bought this used. Any tips would help!

If you select from the Finder the MAcintosh HD the Command i opens the info pane

what do you see there( for the big picture(?)

davevidduong wrote:

It doesn't let me format that. I already clicked on that. It gives me the error "The volume on disk0 couldn’t be unmounted because it is in use by process 0 (kernel)"

Internet Recovery— Option Command R

https://www.ifixit.com/Guide/How+to+Start+Up+a+Mac+in+Internet+Recovery+Mode/119437

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