Storage full, taken up by "other volumes"

Thanks for that! Unfortunately it looks like your Mac wasn't erased correctly, and the previous installation still exists. There's two ways that this can be resolved:

A. Erase your Mac again, but correctly this time

macOS Monterey features "Erase All Content and Settings", which can quickly wipe your Mac in the correct fashion. To run this, open System Preferences, go to the top menu bar, then select System Preferences -> Erase All Content and Settings. Enter your admin password when prompted to proceed.

B. Locate and delete the old volumes in Disk Utility

1. Start up in macOS normally, and log in to your user account.
2. Open Disk Utility, located in Applications -> Utilities.
3. In Disk Utility, you'll likely see duplicated entries for "Macintosh HD". Determine which volume group is your real startup disk:
   1. The real volume group will have either "/" or "/System/Volumes/Data" as the Mount Point, and you won't be able to delete or erase it.
   2. The old volume group will have a different Mount Point, and Disk Utility will allow you to erase or delete it.
4. Once you've found the old volume group, click the (-) button at the top. If "Delete Volume Group" appears as an option, click on that. Otherwise, if the prompt asks you to confirm deleting a volume group, click Delete.
5. Disk Utility will proceed to delete your old data and restore the space back to your real startup disk.

To confirm that your internal drive is now looking as expected, please post the results of "diskutil list" again once the above has been completed. Thanks!

Your setup is mangled.

You reinstalled the OS on your Data volume and the old startup volume still exists.

Assuming you have all of your data on your startup volume, remove Macintosh HD in Disk Utility.

Then, rename Macintosh HD - Data to Macintosh HD or any name you want.

If you look in Disk Utility, Show All Devices from the View popup menu.

You should have a Container with Macintosh HD - Data volumes which contains a subdued Macintosh HD - Data and Macintosh HD - Data - Data.

Outside of that, at the same level as Macintosh HD - Data volumes, you should then see Macintosh HD.

If you take a screen shot of your Disk Utility, I can confirm that is what has happened.

Hi retry76,

Did you recently try to erase your Mac? If yes, it might have been done improperly.

Can you please complete these steps:

1. Eject and disconnect all external drives.
2. Open Terminal, located in Applications -> Utilities.
3. Type "diskutil list" and hit Enter (Return).
4. Post the output here.

The Other category is a potpourri of files which can include:

• System temporary files

• macOS system folders

• Archives and disk images (.zip, .iso, etc. - often found in the Downloads folder)

• Personal user data

• Files from the user’s library (Application Support, iCloud files, screensavers, etc.)

• Cache files: browser, Mail

• Mail messages & attachments

• Fonts, plugins, extensions

• Safari reading list

• iTunes backups

• Crud resulting from jailbreaking your iDevice

• Game data

• Saved data files

• Call history

• Notes

• Media

• Voice memos

• Other files that are not recognized by a Spotlight search

• Media files that cannot be classified by Spotlight as a media file because they are located inside of a package

• Files created and modified by other user accounts on your Mac.

They can be located anywhere on your hard drive.

The files that you have control over are located in the Documents, Downloads, Pictures, Music and Movies folders.  You can use either of these two free apps, GrandPerspective  or OmniDiscSweeper, to find the largest files on your drive so you can determine if they can be deleted or moved to an external HD for storage.  

Note: you can empty the Downloads folder after the apps and/or updates that were downloaded have been installed or applied.  Many users have found a couple of Gigabytes of files in their Downloads folder which are no longer needed.