Free disk space finder for Windows

SizeTrend

Find what is using disk space, track what changed, and reclaim storage without waiting on slow full-folder walks.

SizeTrend scans NTFS drives through the Master File Table, searches by name or content, finds duplicates, compresses large files, and compares snapshots so the source of lost space is easier to pin down.

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SizeTrend 1.5
Windows 10 and 11
Fast NTFS MFT scans
Standalone or installer download

Finding big files is easy. Discovering lost space is the hard part.

SizeTrend is built for the cases where free space disappears and the usual file browser view does not explain why. Save a scan, compare it later, and see only the files and folders that changed.

Search by file name, text, or binary content; list files by size, date, or type; find duplicate files; and compress files or folders in place when you know what can be safely reduced.

Fast drive scans

Direct NTFS Master File Table access keeps scans fast, even on large drives with many files.

Find changed files

Compare saved scan snapshots or filter by recently created and modified files to explain missing space.

Search and clean up

Find files by name, text, hex pattern, duplicate content, size, date, or type, then delete, zip, or compress from one tool.

Scan

See disk usage quickly

SizeTrend reads the NTFS Master File Table directly, so a scan can complete quickly without asking Windows to enumerate every folder one at a time.

Find files by name, content, type, size, or date

Use SizeTrend when you know part of a filename, need to search text or binary file contents, or want to narrow results to recent files and large file types.

Duplicates

Spot duplicate files before they waste more space

Find duplicate files by name, size, or content, then make cleanup decisions with the same drive context used for the scan.

Compare

Track what changed between scans

Save the current scan, compare it later, and SizeTrend shows the difference between the old and current state instead of making you inspect the whole drive again.

Why SizeTrend?

Feature	SizeTrend	WinDirStat	WizTree	TreeSize Free	TreeSize Prof
Ultra-fast scans using NTFS Master File Table	✔	❌	✔	✔	✔
Scan as non-elevated user without admin rights	✔	✔	❌	✔	✔
Compare to a past scan snapshot	✔	❌	❌	❌	✔³
Filter scans by date or file type	✔	❌	✔¹	✔	✔
Find files or folders by name	✔	❌	✔¹	✔	✔
Text file content search	✔	❌	❌	❌	✔
Binary file content search	✔	❌	❌	❌	❌
Find duplicate files	✔	❌	❌	❌	✔
Zip or compress large files or folders with one click	✔	❌	❌	❌	✔²
List files by size or date	✔	❌	✔	❌	✔
Show space taken by file types	✔	❌	❌	❌	✔

¹ File name filter only, no filtering by date. ² Compress only; zipping is only available as a bulk operation. ³ Typical time to save an SSD drive scan: 1 hour or more for a 600 MB SQLite file or 10 seconds for a 300 MB folders-only XML file, compared to SizeTrend's 5 seconds for a 90 MB full scan file.

When a drive slowly fills up, SizeTrend shows what changed.