SpaceSnifferCompare Several Storage Drives
Use this workflow on an authorized Windows 10 or Windows 11 computer. SpaceSniffer shows a size-proportional view of storage; always inspect the source file in Windows before changing or deleting it.
Step-by-step workflow
- Scan the first volume.
- record its largest folders.
- open or scan the second volume.
- compare used-space patterns and free capacity..
How to verify the result
You can identify which drive has the highest-value cleanup candidates.
Why this matters
SpaceSniffer is a visualization tool, not a diagnosis of file necessity. The important outcome is an identifiable path and measurable file size, checked against the same Windows volume and with permission to inspect it. If the scan is incomplete, report that limitation instead of treating missing paths as zero bytes.
More targeted troubleshooting
If the result differs from what File Explorer reports, clear the filter field, allow scanning to finish and check the permissions of the specific directory. Repeat on a smaller known folder when you need to isolate a scanning limitation. Always distinguish a changed treemap view from an actual change in free space.
Frequently asked questions
What is the first step for compare several storage drives?
Scan the first volume.
How do I check the result?
You can identify which drive has the highest-value cleanup candidates.
What should I avoid?
Do not compare raw block area across separate windows without checking each volume's scale.
Related Windows topics
- Scan the Windows C Drive
- Scan an External USB Drive
- Analyze SSD Storage With SpaceSniffer
- Analyze a Large Hard Drive
Sources and further reading
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