How to Check Laptop Storage (Windows, Mac, Chromebook)

On Windows 11, the fastest way is Settings > System > Storage — it shows a used/free bar plus a category breakdown (apps, temp files, documents) in one screen. Press Win+E and click This PC if you just want the raw used/free number without the categories. On a Mac, it's Apple menu > System Settings > General > Storage. On a Chromebook, open Settings, then Storage under the Device section. The rest of this guide covers the Windows 10 equivalent, how to tell if you've got an SSD or a hard drive, how much free space you actually need, what's usually eating the space, and what to do once the drive is full.

Windows 11: Settings vs. File Explorer

Both routes work; use Settings when you want to know what is taking up the room, and File Explorer when you just want the number.

Settings (recommended — shows the breakdown):

1. Open Settings (Win+I) and go to System > Storage.
2. You'll see a colored bar showing used vs. free space for your main drive, with a total like "412 GB used of 953 GB."
3. Below the bar, Windows lists categories — Apps & features, Temporary files, System & reserved, Documents, Desktop, and so on — each with its own size. Click a category to see what's in it.
4. Further down, Storage management groups Storage Sense, cleanup recommendations, and advanced settings (including a "Disks & volumes" page that lists every physical drive and partition separately, useful if you have more than one drive).

File Explorer (fastest — just the number):

1. Press Win+E, then click This PC in the left sidebar.
2. Under "Devices and drives," each drive letter shows a bar with used and free space directly beneath it — no clicking required.
3. Right-click any drive and choose Properties for the same used/free numbers in a dialog, plus the exact byte count if you need precision.

If a drive shows a red bar instead of blue, that's Windows flagging it as low on space — usually under 10-15% free, more on why that threshold matters below.

Windows 10: what's different

The path is the same — Settings > System > Storage — but the layout differs in two ways. Storage Sense sits at the top of the page rather than being tucked into a submenu, and the category list populates directly on that same page instead of routing you to a dedicated screen the way Windows 11 does. Functionally you get the same information: a used/free bar and a per-category size breakdown. One thing worth knowing if you're still running Windows 10: it reached end of life in October 2025, so there are no more security patches — worth factoring in if you're deciding whether a storage upgrade is worth doing on that machine or whether it's time to move to a Windows 11 machine instead.

macOS

1. Click the Apple menu > System Settings.
2. Select General in the sidebar, then click Storage on the right.
3. You'll see the same colored bar concept as Windows — segments for Apps, Documents, System Data, and more, with free space shown as the remaining light gray portion. Hover over any segment for the exact size.
4. "System Data" (called "Other" on older macOS versions) is usually the biggest mystery category — it covers app caches, browser caches, local Time Machine snapshots, Spotlight indexes, and swap files. It's normal for this to be tens of gigabytes; only worry if it's ballooning month over month.

macOS also offers "Optimize Storage" recommendations on the same page — things like auto-emptying the Trash after 30 days or offloading unused apps — worth a glance if you're chronically tight on space.

ChromeOS (Chromebook)

Open Settings, then find Storage management under the Device section. It breaks usage into My files (downloads and local media), Browsing data (cache and history), Linux storage (if you've enabled the Linux/Crostini container for dev tools), and System. Most Chromebooks ship with small drives — 32-128 GB isn't unusual — so this screen is worth checking sooner than on a Windows or Mac laptop; the Files app itself will also flag low space and offer to clear the Downloads folder for you.

Check whether you have an SSD or a hard drive

This matters because it changes both what "full" means for your drive and whether upgrading is worth doing. SSDs like more free headroom (see below) and are worth prioritizing for an upgrade — HDDs are cheap per gigabyte but slow enough that most laptops sold in the last several years use an SSD as the primary drive already.

On Windows 11 (and current Windows 10 builds), open Task Manager (Ctrl+Shift+Esc), click Performance, and select each disk listed on the left. The label near the drive name reads "SSD" or "HDD" directly; recent Windows 11 builds go further and specify the interface too, like NVMe or SATA. You can also search "Defragment and Optimize Drives" in the Start menu — it lists every drive with a Media type column that says "Solid state drive" or "Hard disk drive."

If it turns out you're on a hard drive, or on a small SSD, our free SSD upgrade checker tells you whether your specific laptop model takes an NVMe or SATA drive before you buy one — and if storage isn't your only bottleneck, the RAM upgrade checker does the same for memory.

How much free space should you keep?

Ignore the old "100 MB" advice — that's a Windows XP-era number and it's not enough to do anything useful on a modern OS. The current guidance, and the one we'd actually follow: keep roughly 10-15% of an SSD free.

Two reasons this isn't arbitrary. First, SSDs need a pool of free blocks for wear leveling and garbage collection — the controller shuffles data around in the background to spread write wear evenly, and it needs empty space to do that. Let the drive get too full and write performance measurably drops, because the controller runs out of room to work with. Second, Windows itself needs headroom: a feature update needs somewhere in the neighborhood of 20-30 GB of free space to stage the install, on top of whatever your hibernation file, page file, and temp files already claim. Microsoft's own guidance for feature updates asks for at least 20 GB free (64-bit systems); we'd budget more if you can spare it. If you're closer to a hard drive than an SSD, the wear-leveling math doesn't apply, but the update headroom still does — same 15-20 GB-plus buffer, just for a different reason.

Practical takeaway: on a 512 GB drive, treat anything under about 50-75 GB free as "time to clean up," not as an emergency yet. Under 20 GB free is the point where Windows Update and app installs start actually failing.

What's eating your storage

Start with the category breakdown from Settings > System > Storage (Windows) or System Settings > General > Storage (Mac) — it'll usually point at the obvious culprit without any extra tools. The most common space hogs:

• Windows.old — the backup of your previous Windows install after an upgrade, sometimes 20+ GB, auto-deleted after about 10 days but sometimes stuck around longer if you don't clean it manually.
• Hibernation file (hiberfil.sys) — sized to a chunk of your RAM; disabling hibernation reclaims it but you lose fast-resume.
• Recycle Bin — easy to forget it's not actually gone until you empty it.
• Downloads folder — installers and files nobody deletes.
• Browser caches — Chrome and Edge caches can quietly grow into multiple gigabytes each.
• Old Windows Update files — Storage Sense's "Windows Update Cleanup" or the built-in Disk Cleanup tool clears these safely.
• Games — modern AAA titles routinely run 80-150 GB each; two or three installed titles can eat a small SSD on their own.

For anything the built-in breakdown doesn't explain clearly enough, use a proper disk space analyzer. WizTree is the one we'd point you to — it's free for personal use, reads the NTFS Master File Table directly instead of walking the file system, so it scans a full drive in seconds instead of minutes, and it shows a treemap of exactly which folders are the actual offenders. TreeSize Free and WinDirStat are the longer-standing free alternatives if you want a second opinion or WizTree's speed trick doesn't apply to your file system.

When storage is actually full

Work down this list in order — cheapest and fastest first:

1. Clean up what's already there. Run Storage Sense (Settings > System > Storage > Storage Sense on Windows 11, or the Storage page's cleanup recommendations on Mac) to clear temp files, old Windows Update data, and Recycle Bin contents automatically. This alone often recovers 10-30 GB with zero effort.
2. Move media off the drive. Photos, videos, and old project files are usually the bulk of what's left after cleanup. An external hard drive or a cloud service (OneDrive, Google Drive, iCloud) gets bulk files off your main drive without deleting anything.
3. Upgrade the SSD. If you're still tight after steps 1 and 2, the drive itself is too small for how you use the laptop — cleanup is a temporary patch at that point. Our guide on increasing laptop storage walks through the options, and if you're worried about losing your current setup, installing an SSD without reinstalling Windows covers cloning your existing drive over. Use the SSD upgrade checker first to confirm what your model actually supports.

Frequently asked questions

How do I check how many GB my laptop has? Windows 11/10: Settings > System > Storage shows total capacity and used/free space. Mac: System Settings > General > Storage. Chromebook: Settings > Storage management. All three show the number at the top of the page — no math required.

How do I know if my laptop storage is SSD or HDD? Task Manager > Performance on Windows lists each disk as SSD or HDD (and often the interface, like NVMe or SATA, on recent builds). Searching "Defragment and Optimize Drives" and checking the Media type column works too. On a Mac, virtually every model sold since 2016 uses an SSD, so this generally isn't in question.

Why does my laptop show less storage than advertised? Two separate effects stack up. Manufacturers advertise capacity in decimal gigabytes (1 GB = 1,000,000,000 bytes), while Windows and macOS report it in binary gibibytes (1 GiB = 1,073,741,824 bytes) but label it "GB" — that conversion alone shrinks a "1 TB" drive to roughly 931 GB before you've stored anything. On top of that, a hidden recovery partition (Windows) and file system overhead both claim a few more gigabytes. None of it is a defect; it's how the numbers are labeled.

How much storage does Windows 11 itself take? A clean install runs roughly 20-30 GB depending on edition and preinstalled apps, and that grows over time as update backups, driver caches, and restore points accumulate. Microsoft's official minimum requirement is 64 GB of storage for the OS to install at all — treat that as a floor for a usable machine, not a comfortable target.

What to actually do

Check the category breakdown before you delete anything blind — Settings > System > Storage on Windows or System Settings > Storage on Mac takes 15 seconds and tells you exactly what's worth touching. If Storage Sense and a cloud/external drive move don't get you comfortably back above 15% free, that's not a cleanup problem anymore — it's a "the drive is too small" problem, and the fix is a bigger SSD, not another round of deleting browser cache.