Storage Analyzer

Free

See where a site's storage actually goes — version-history bloat, recycle bins, the Preservation Hold Library — with the top offenders and the gap between what you can see and what you're billed for.

Download free package See all seven tools

Storage Analyzer web part running on a SharePoint page

The shipped web part on a real SharePoint page.

What it does

Top storage offenders per site, ranked

Shows the gap between visible files and what you're billed for

Drill-down and export come with TrimVersions365

Safety audit for this tool

Every SharePoint call this tool's code makes — the same table checked by the build and by the verifier script in the download.

Call	Method	Destructive?
…/_api/site/usage, library/file listings	GET	No — read only

Full cross-tool table and the shipped verifier script are on the main safety audit page.