Storage has "OTHER" which has 58 GB of space. What is OTHER and how do i remove it?

Another thing I have found useful, when people report huge amounts of “Other” storage use, tarang225, is to used Disk Utility, with the View set to “Show All Devices”.

Then select the Container of your “Macintosh HD” and “Macintosh HD - Data” Volumes.

This will show you all the Volumes on that physical drive, including your VM (Virtual Memory), and any “Not Mounted” Volumes (under “# Not Mounted”, where # is the number of not mounted Volumes, which is usually no more than 2: Preboot and Recovery).

Right now, in Catalina, these additional Volumes are lumped under “Other”, since there is no other storage category for such.

Under more normal situations, Preboot and Recovery, together, will account for only ~3/4 of a GB, while VM will be at or above the Swap space shown within Activity Monitor, under Memory. (Mine runs at around 7GB.)

If you see a large portion shown as “Not Mounted”, especially if the number of “Not Mounted” volumes is three (3) or more, this may be a culprit.

I’m simply trying to help us “cover the bases”.

In addition to the other (ha ha) posts, Other can be other user’s data. If you have multiple users, their data appears as “Other.”

That seems odd, Barney-15E, since, on my Catalina system, I see such classified as “Other Users”.

Maybe you meant to respond to Barney-15E, Old Toad?

This is what I was alluding to, in my response to Barney.

Probably. Sometimes a thread becomes somewhat convoluted that I'm not sure who I'm responding to. Thanks.

Quite understandable, Old Toad!

The most common possible cause under macOS Catalina is if you had ever turned on "Time Machine" for backups but haven't backed up your drive in a very long time it could be pending backups/file changes that macOS has been keeping track of for you. If that's the case you can let it complete its Time Machine backup or turn off Time Machine if you don't care about anything it had been saving up for you.

https://support.apple.com/en-us/HT201250

If Time Machine is already off (and was never on in the past) then this is likely not the issue.

The other common possibility is you have a lot of app-related data in your user-specific "library" folder inside of Application Support ("~/library/Application Support") like from old apps you may have once had and deleted the main app for, but all of its supplemental data is still there. You can check by going to Finder, Go menu, hold down the Option key to reveal a hidden menu item called "Library", It could be something else in Library, but generally it's something further down in that "Application Support" folder.

If you go to that location and change your Finder "View" menu selection to "As List", and then go to "View Options" and choose "Calculate All Sizes" and click "Use As Defaults" then close the View Options box:

Then your Finder will show a more useful view with folders populated with sizes. Be sure and click the "Size" column header so your list is sorted from largest to smallest. I wouldn't bother with anything less than about 3.0 GB in size. You should only delete things that you A) specifically recognize as something you installed, and B) don't use anymore.

If you don't feel comfortable doing this I would have someone from Apple help you out over the phone.

Other is typically data that MacOS doesn't know how to classify. It can often be due to the system just losing track of what certain data was. I've seen Other grow over time because MacOS just loses track of what the data was as it was moved around.

Follow this article for how to rebuilt the spotlight index which will force the system to reexamine the data and hopefully fix the issue.

https://support.apple.com/en-us/HT201716

The Other category is a potpourri of files which 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

• Fonts, plugins, extensions

• 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

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. 

That seems odd, Barney-15E, since, on my Catalina system, I see such classified as “Other Users”.

Depends on the view you are looking at. But, I stopped bothering with any of them about 10.15.3, so they may have updated the Manage pane to reflect that. Since it is completely useless, I use other tools.

You didn't look far enough. There are two "Other" sections in that graph: