Your C: drive says "400 GB used of 500 GB" and Windows 11's built-in Storage settings only gives you vague categories like "Apps & features" and "Other". You need to see which folders are hogging gigabytes. That's what a disk space analyzer does.
This guide compares your options, explains why the built-in Storage page is so unhelpful, and walks through a 30-minute end-to-end disk cleanup workflow using the read-only analyzer in RBS PC Cleaner.
Why Windows 11's Storage settings is misleading
Settings > System > Storage looks like it answers the question "what's using my disk space", but it doesn't really. It groups files into broad categories — Apps & features, System & reserved, Documents, Pictures, Music, Videos, Mail, OneDrive, Desktop, Maps, Other Users, Temporary files, Other. That last bucket — "Other" — is often the biggest, and Windows tells you nothing about what's in it.
The categorisation is also misleading. A 30 GB Steam game shows up under "Apps & features" but the actual game files are inside C:\Program Files (x86)\Steam\steamapps\common\ — Settings doesn't tell you that. A 5 GB Discord cache shows up under "Other" because Discord's data is in %APPDATA%.
You need a real folder-by-folder view, not a category summary. That's where a disk analyzer comes in.
What a disk analyzer should do
- Show folder sizes sorted biggest-first.
- Let you drill down with one click into any folder.
- Be read-only. An analyzer shouldn't offer to delete things — that's a cleaner's job. Mixing them is how users accidentally nuke
C:\Windows. - Not require admin rights for user folders (Downloads, Documents, Desktop).
- Not upload your folder tree to a cloud service (some sketchy tools do).
RBS PC Cleaner Disk Analyzer
The Disk Analyzer page in RBS PC Cleaner:
- Pick any folder (or a whole drive) and click Scan.
- Shows folder tree sorted by size, biggest at top.
- Drill in / drill out with arrow clicks.
- 100% read-only — there's no Delete button here. If you want to clean something, use the dedicated cleaner pages.
- No admin required for normal user folders.
- Local only — nothing is uploaded.
Common space hogs you'll find
Across 1000+ scans we've informally run:
- C:\Users\<you>\AppData — usually 20–60 GB of app data, cache, logs. Look inside for Electron apps (Teams, Discord, Slack).
- C:\Users\<you>\Downloads — 5–30 GB of installers, PDFs, ZIPs you meant to sort.
- C:\Program Files\WindowsApps — Microsoft Store apps. Don't touch directly.
- Game installation folders — Steam's
steamapps\common, Epic'sEpicGames, GOG Galaxy. A single AAA game is 80–150 GB now. - C:\Windows\SoftwareDistribution — old Windows Update files. Safe to clean via Disk Cleanup.
- C:\hiberfil.sys — hibernation file, roughly 40–75% of your RAM size. Not deletable directly; disable hibernation via
powercfg /h off. - C:\pagefile.sys — virtual memory. Windows manages this; don't delete.
Alternative tools
WizTree and WinDirStat are both excellent standalone disk analyzers and free. RBS PC Cleaner's analyzer isn't trying to replace them — it's there so you have a built-in way to see where your space went without installing a second tool. If you want deep reporting, professional MFT-level speed, or treemap visualizations, use WizTree. For everyday "where did my 100 GB go?", the built-in analyzer is plenty.
A 30-minute disk cleanup workflow
Here's the order I'd actually do this in if my drive was full and I had half an hour:
- Run the analyzer on C:\. Five minutes scan time on a 500 GB drive. Note the top 5 biggest folders.
- Browse games and big apps first. If you have a game you haven't played in a year, uninstalling it is often a quick 50-150 GB win. Use the Bulk Uninstaller if multiple programs are candidates.
- Clean Electron-app caches. Discord, Teams, Slack, VS Code — easily 5-15 GB combined. Step-by-step here.
- Clear browser caches. Another 2-8 GB. One-click guide.
- Run Duplicate Finder on Downloads, Pictures, Documents. Hash-based, keeps the oldest, ignores system folders. Often another 5-20 GB. How it works.
- Empty Recycle Bin. Don't forget this — Windows doesn't reclaim the space until you do.
On a typical "full" laptop, this workflow reclaims 30-80 GB and takes about half an hour with most of it being scan time you can ignore.
Tip: combine with Duplicate Finder
Once the analyzer shows you that Downloads is 25 GB, run Duplicate Finder on that folder. Often 30–60% of that 25 GB is duplicates you don't need.
Related articles
- How to Find and Delete Duplicate Files on Windows — the fastest way to trim big folders.
- Uninstall Multiple Programs at Once on Windows — big apps are often the bigger wins.
- How to Clean Windows 11 Without Breaking It — safe cleanup for the rest.
- Clear Discord, Teams, Spotify Cache — Electron apps are surprise space-hogs.
- RBS PC Cleaner v1.0.0 Launch — full feature list.