How the guides are organized
The list below is grouped by the moment you're in: getting your bearings, dealing with an external or networked drive, and the point right before you delete anything. If you're new to this altogether, the how to use TreeSize walkthrough is a better first stop than any single guide here.
Start here
- Check folder size on Windows — the fastest ways to get a folder's real size, from Properties to PowerShell.
- Free up disk space on Windows 11 — an ordered routine for clearing room on a system drive.
- TreeSize Portable explained — what the portable build is for and when it beats an installed copy.
- Windows Storage Settings vs TreeSize — where the built-in Storage page falls short.
Drives and shares
- Scan an external drive — USB speed, file systems, and what backup drives usually hide.
- Scan a network drive or share — UNC paths, permissions, and why SMB scans crawl.
- Run TreeSize as administrator — why elevation changes what a scan can actually see.
Before you delete anything
- Delete large files safely — a checklist for telling a safe-to-remove file from a system-critical one.
For the broader picture on what a scan result means before you act on it, see how to use TreeSize and is TreeSize safe.
Guide FAQs
Which guide should I read first if my C: drive is full?
Start with free up disk space on Windows 11. It walks through the routine in order, from measuring what's using space to confirming what you recovered.
Do these guides require a paid edition of TreeSize?
Are these guides specific to one Windows version?
Continue reading
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