I’ve a 2020 MacBook Air with – theoretically – a 1TB solid-state drive.

The Finder says I’ve solely 64.4G free; Storage in System Settings says 935.2G is used, 411.6 of which is “System Information”. CleanMyMac equally says 941.64G is used… BUT after I run its House Lens, it finds 575.3G beneath Customers, 74G beneath Functions, 12G beneath Library, 11G beneath System, and fewer than 10G for the whole lot else. That ought to be not more than 700G used – and it does not point out any “System Information”. (GrandPerspective provides me an analogous consequence.)

What is that this “System Information” that is consuming the remaining 200+ gigabytes of my laborious drive, and the way do I eliminate it? This thread advised that updating your OS or turning on Full Disk Entry in CleanMyMac might assist clear up it, however I did each and neither labored. CleanMyMac additionally did not discover any malware, even on a deep scan. I’ve heard it advised that Time Machine backups may be the perpetrator for this kind of factor, however I’ve Time Machine set to again as much as an exterior drive, so far as I can inform.

Efficiency has additionally been actually sluggish typically currently (it will typically take a number of seconds to open a folder within the Finder after I click on on it). I had a brand-new SSD put in in late 2021 (after a espresso spill); it does not appear probably {that a} drive can be giving up the ghost after lower than two years. One thing’s clearly gone mistaken right here however I actually cannot inform what.