Large games and creative suites often cache under ProgramData or user AppData. Sort folders by size only after quitting related launchers.
Windows Update and Store delivery optimization can hold gigabytes. Clear caches when no downloads are active, then rescan free space.
After major cleanups, empty Recycle Bin and run Storage sense once; leftover scans rarely touch those buckets automatically.
Sort large folders only after related apps are closed. Game launchers, Adobe Creative Cloud, and backup agents keep huge files open under ProgramData and AppData\Local. Deleting “big” folders while those processes run invites partial deletes and corrupted libraries.
Check C:\Windows\SoftwareDistribution\Download when Windows Update finished successfully but space never returned; the cleanup wizard sometimes needs a second pass after reboot. Pair that review with the Delivery Optimization cache if you use peer-assisted updates.
Do not treat WinSxS as a manual delete target. Component servicing protects that store; use built-in cleanup tools and optional features removal instead of Explorer deletes that can destabilize servicing stacks.
Hibernation and page files can dominate laptops. Disabling hibernation via powercfg /h off frees hiberfil.sys but removes fast startup tradeoffs—decide with the device owner, not silently during “cleanup.”
After uninstalling creative suites, rescan for renderer caches (Media Cache, Peak files) that uninstallers skip. Move anything questionable to an external drive for a week before permanent deletion.
Shadow copies and backup software inflate “free space” surprises. If File History or a third-party image tool runs hourly, deleted gigabytes may still count toward protected volumes until retention policies trim older snapshots.
Steam, Epic, Battle.net, and EA app libraries often keep redistributable installers under game folders. After uninstalling titles, verify those _CommonRedist trees are truly orphaned before deleting them in bulk.
Windows Sandbox and Docker Desktop leave differencing disks even when the UI looks idle. Shut down WSL and Docker cleanly, then review large .vhdx files alongside Optional features guidance.
When SSD health tools warn about excessive writes, prefer moving caches to a secondary drive instead of endlessly purging the same folders weekly—stability beats chasing every last megabyte.