Compare Two Disk Inventories Fairly

Short answer: Control scan scope and measurement before attributing a difference to storage growth.

By DiskAnalyzer editorial resource · Published 2026-10-05 · Documentation reviewed 2026-10-05

When this guide is useful

Report the largest increases and decreases with their time interval. Exclude deliberate scope changes from the growth conclusion so a new filter does not look like reclaimed storage.

Recommended workflow

Record the baseline date and root.
Repeat the same scope later.
Compare matching paths using the same size measure.
Investigate renamed or moved folders separately.

Limits and precautions

A path that disappeared may have moved rather than been deleted.

Keep a useful record

Record the drive or folder, scan time, application version and the measurement you used. Keep observations separate from proposed changes. If a result leads to a cleanup, record the file owner, backup status and actual free-space change. This makes the result easier to review and helps explain differences in a later scan.

Quick review checklist

Question	What to record
What did you inspect?	The exact volume or folder, not just the PC name.
What action is justified?	Investigate renamed or moved folders separately.
What could go wrong?	A path that disappeared may have moved rather than been deleted.

Next steps

If the result is unclear, preserve the current report and narrow the investigation to one folder or application. Make one approved change at a time, then repeat the relevant measurement. Avoid presenting a predicted saving as a measured outcome.

Sources and verification

Prepared from public documentation and practical storage-audit reasoning. No hands-on Windows test or independent binary inspection was performed for this publication. Menu names and package requirements can change; check the developer documentation for your installed version.