System Storage is 64 GB

The above is not going to help.

The information pane that you're looking at is notoriously unreliable in giving you up to the minute information on your storage capacity. I highly recommend you right click on your hard drive and choose "get info". That will give you an exact display of exactly how much storage you have available.

Check your documents folder for junk or unnecessary items. Backups have NOTHING to do with this.

iCloud also has nothing to do with this and going down that road can make it worse. It's not a backup service, it's a synchronization service.

yellowblue Said:

"System Storage is 64 GB: My system storage on my MacBook Air is showing 64.49 GB, how is this possible? Can someone guide me as to how I can reduce this storage? I can't update to the newest Catalina."

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I. About System Storage:

• A Gigabytes is 1,024 Bytes, so, it's just rounded to the best it can be. So, that is why you see 64.49GB.

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II. Utilizing Storage Space:

• Remove Malware:

But, you may have malware installed. "Malware" is short for "Malicious Software", which makes you Mac act in a mislead manor. So, scan for Malware using Malwarebytes for Mac and remove what is found from the quarantine.

• Uninstall Videos and Music:

Videos consume lots of space (typically 2-4GB for a Movie - and 500GM -1GB for a TV show). So, 10 movies would take up 40GB max (2.3 the storage)

• Uninstall Unneeded Applications:

Applications can take up lots of space too - usually in the GBs. So, uninstall it, using an uninstaller. Download the uninstaller from the manufacturer and none other. Elsewise, it could result in spyware and malware installed. Do not just drag it into the trash, as caches and other temporary files would just lay about.

• Clear Temporary Internet Files

Try clearing your Temporary Internet Files (Cookies & Cache) of Safari. Cookies perform remembrance of certain site-entered data. Whereas Cache keeps a snapshot of the last time you visited a site.  Use this Link: Clearing History and Cache - Apple Communities

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IV. Use Other Storage Locations:

• Export Data:

If you have an extensive about of unneeded items installed, then use an external hard drive for storage. The, access it when need be.

• iCoud Storage:

You might need to upgrade your storage plan. If that is the case, go here for your options on plans and prices:

--- iCloud storage plans and pricing - Apple Support

--- Buy more iCloud storage - Apple Support

--- Annual iCloud storage plans - Apple Support

1024 bytes is a kilobyte.

yellowblue Said:

"System Storage is 64 GB: This doesn't help me. How do I access my system storage? I ran the malware and there was nothing found. My system storage is now at 67 GB, there is no reason for it to be this high. Please advise how to access it and fix this."

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Deleting "Other":

Thank you for the screenshot. Apparently, I misinterpreted your post as if it were based off a 64GB Hard Drive.

Are you wanting to delete "Other"? "Other" refers to files that may be unbeknownst file types to your Mac, and it may be backups. So, promptly manage your backups - don't just delete them (Step 2).

1. Create a Time Machine Backup:

Important: Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with managing your disks. Use an external hard drive that is at least 1.5 times the size in total storage capacity.

2. Manage your Backups:

Go Here: Locate Backups of your iPhone, iPad, and iPod Touch - Apple Support. See if there are any backups that reside on your Mac. If you don't need them, rid of them promptly (IOW: Don't just delete them), in accordance with this link: Delete or copy backups on your Mac or PC - Apple Support