Your Windows 11 PC might be hiding a 500GB storage bug – how to check


Windows 11 system file size bug

Lance Whitney/ZDNET

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ZDNET’s key takeaways

  • A bug in Windows 11 can claim up to 500GB of disk space.
  • The culprit is a Windows system file that just keeps growing.
  • The bug is fixed in the Windows June preview update and the July update.

Do you have a sneaking suspicion that your Windows PC is losing disk space? If so, it may not be your imagination, at least not if your system has been hit by a known bug.

A particular file in Windows 11 can grow to the point that the loss in disk space becomes noticeable. The culprit here is a system file named CapabilityAccessManager.db-wal, as spotted and described by Windows Latest.

Part of the Capability Access Manager Service, this otherwise obscure file manages the permissions granted to applications to access the camera, microphone, location, and other privacy-minded features. The db-wal extension indicates that this file stores any changes in a write-ahead log before they’re written to the main database.

Also: You can soon restore Windows 11 from scratch even if it can’t boot up – here’s how

The file itself can certainly grow as it needs to keep track of more data. However, it should top out at no more than a megabyte or two. Instead, the bug in Windows seems to cause it to expand to as much as 500GB, according to one Redditor who posted a message a year ago (yep, it’s been around at least that long).

How to tell if you’re affected

How can you tell if you’re affected by this bug? One way is to check the size of your Windows system files. 

To do that, go to Settings, select System, and then click Storage. Under the first bar image, click the link for “Show more categories.” If the category for System & reserved shows no more than two or three dozen gigabytes, then you’re in the clear. But if it indicates a size that stretches beyond 100GB, then your system is likely affected by the bug.

Also: Too many junk files on your Windows PC? This free tool can remove them in one click

I checked all my Windows 11 environments, including those directly on PCs and those in virtual machines. On all except one, the size for this category ranged anywhere from 5GB to 25GB. But on my primary Windows 11 laptop, the size hit 151GB.

Okay, but how do you know that CapabilityAccessManager.db-wal is to blame for the growth?

The file itself is housed in the following location: C:\ProgramData\Microsoft\Windows\CapabilityAccessManager. However, Windows denies you access to that folder by default, and I don’t suggest changing the permissions on a system folder even if you know how.

Instead, Windows Latest recommends running a utility like WizTree, TreeSize, or WinDirStat in admin mode to view the files in that folder. But there’s an easier option using the built-in Robocopy tool. Open a command prompt as an administrator and type the following string: robocopy “C:\ProgramData\Microsoft\Windows\CapabilityAccessManager” “%TEMP%\CAMCheck” /L /B /R:0 /W:0 /BYTES /NP.

I ran that Robocopy command on my own Windows 11 installations. Almost all reported a size of around 57,000 bytes, or a fraction of a megabyte. But on my primary Windows 11 laptop, CapabilityAccessManager.db-wal weighed in at 7GB, not out of control but still much larger than normal.

How to fix the glitch

Though the bug has been around for at least a year, Microsoft has finally gotten around to fixing it. In the June 23 optional preview update, a note says: “This update improves disk space usage for the CapabilityAccessManager.db-wal file.” That likely explains the difference among my PCs. I’ve already run this preview update in my Windows 11 virtual machines, but not on my laptop.

Also: How to get free Windows 10 security patches until October 2027

If you want to install this one, just head to Settings and select Windows Update. You should see that the 2026-06 Preview Update is available. Just click Download & Install to grab it. But keep in mind that these preview updates are optional for a reason. They’re designed more for IT admins and power users who want to test them ahead of the general release.

The same updates are packaged into the following month’s official Patch Tuesday rollout, which is designed for all Windows users. If you can live with the shot to your disk space, I’d advise waiting until July 14 to grab the entire mandatory update. At that point, this file size bug should be squashed for everyone.





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Today, when one pictures a “classic Dodge Charger”, the first image that pops up is almost certainly one of the highly desirable Charger models from the late 1960s or early ’70s. Indeed, those early muscle car Chargers are iconic, playing a starring role in the “Dukes of Hazzard” television show and, somewhat more recently, “The Fast and the Furious” films. But as time ticks on, is it time to start appreciating the modern version of the Charger as a potential modern classic?

It’s now been over 20 years since Dodge brought back the Charger nameplate for a spacious four-door sedan with an optional HEMI V8 engine. While the basic Charger R/T was a potent machine for its time, Dodge really took the Charger’s game to the next level for the 2006 model year with the debut of the Charger SRT8. 

The SRT8 model used a larger version of the third-gen HEMI V8 that, combined with other performance upgrades, transformed the sedan into a serious performance car capable of running with its 1960s HEMI ancestors at the drag strip — to say nothing of its vastly superior handling and refinement. In the years that followed, Dodge would continue to improve the Charger’s performance with larger and more powerful HEMI engines, but the significance of the original Charger SRT8 is not to be overlooked.

A muscle car legend reborn for the 2000s

Today, with the modern Charger being such an established part of the car enthusiast world, it’s easy to forget some of the controversy that surrounded its mid-2000s return. Most of it focused on the fact that the beloved muscle car nameplate had been brought back for a four-door sedan rather than a retro-styled coupe. Fortunately, those people looking for that retro coupe would be satisfied by the reborn Dodge Challenger when it arrived a few years later, while the Charger went on to become a highly popular muscle sedan in its own right.

The addition of the SRT8 model to the lineup certainly helped, of course. Under the hood was the larger 6.1-liter HEMI V8, which differed from the standard 5.7-liter HEMI in several ways, not least the displacement. With the 6.1 under the hood, the SRT8 made 425 hp and 420 lb-ft of torque, easily laying down a mid-13-second quarter-mile time in Motor Trend’s hands. This was very quick by mid-2000s standards, especially considering the now-outdated five-speed automatic transmission.

But the SRT8’s performance went beyond just the drag strip. As part of the SRT transformation, Dodge also gave the car larger wheels and tires, a retuned suspension setup, and large Brembo brakes. While this didn’t necessarily make the car an agile road course weapon, it did give the SRT8 an athleticism that belied the Charger’s weight and size. 

The evolution of modern Dodge muscle

What’s even cooler about this era in Chrysler/Dodge performance history is that the Charger was just one of the four-door LX platform cars that the automaker offered with SRT badges and a powerful HEMI engine under the hood. Apart from the Charger, buyers could also choose from the more upscale, but ultimately short-lived SRT version of the Chrysler 300C sedan or the Dodge Magnum SRT8 station wagon.

The original Charger SRT8 marked the beginning of a long run of increasingly powerful, high-performance models. In the early 2010s, the Charger SRT8’s 6.1 HEMI was replaced by the larger and more powerful 6.4/392 HEMI, with that motor eventually becoming available in the less expensive Charger R/T Scat Pack. Then, of course, came the Charger SRT Hellcat, with a 707-hp, supercharged 6.2-liter that turned the car into a genuine super sedan.

So is the original Charger SRT8 a guaranteed future classic? Classified listings show that clean examples still bring decent money today, but the fact that it was followed by improved models may ultimately limit its potential for becoming a true, mega-desirable collector car. Regardless, though, the Charger SRT8’s accomplishments in modern muscle car history are not to be taken lightly.





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