Reading the scan
The Overview turns a large folder tree into a shorter list of questions worth investigating. It separates data that SizeTrend can clean safely from files that need a decision from you.
This section contains known temporary data, caches, and Windows cleanup categories with a specific action. The button may ask Windows or the application to perform the cleanup, open a review first, or remove only a narrowly recognized cache.
Read the explanation before clicking. Some caches should be cleaned only after the owning application is closed, and rebuilding a cache may make the next launch, restore, or project build slower.
This section includes storage that may be large but is not automatically disposable. Examples include Downloads, cloud files kept offline, Outlook data, backups, torrent downloads, media project data, database files, virtual machines, and restore information.
A Review action lets you inspect the files or opens the program that owns them. It does not mean everything in that row should be deleted. The distinction between cleanup and review is one of the most important parts of the Overview.
Large Installed Apps, cleanup categories, and storage-review rows can combine several folders. Expand a row to see the program, data, cache, or project locations contributing to the total. Shared locations are counted once even when several applications use them.
Click a location to navigate to it in the folder tree. This lets you move from the explanation to the scanned files without guessing where an application stored its data.
What Changed compares the current scan with an earlier compatible snapshot. It is the best place to start when free space fell recently. Largest Folders and Unusually Large Files describe the current drive even when no earlier scan exists.
System-managed space is collapsed because those entries need Windows-specific handling and are not ordinary folders to delete. Expand it when the unexplained total points to restore points, component storage, or another Windows-managed category.
The circular button in the Overview header refreshes the Overview analysis and installed-application information. Use it after an application was installed, removed, or changed while the scan data itself is still current.
Use the main Refresh command when files were created, removed, or resized and you need the folder tree totals updated. Hiding and showing the Overview does not refresh either data source.
SizeTrend can show an At least ... freed with SizeTrend total after successful cleanup or permanent-deletion actions. It caps the credit by the free space actually observed on the affected drive.
Moving something to the Recycle Bin does not count because the data still occupies the drive. The number is a minimum confirmed result, not an estimate of every cleanup you may have performed outside SizeTrend.
Use the explanation, not just the biggest number.
The Overview tells you which storage is cleanup, which is review, and which belongs to another tool.