Which leftover files does Storage Studio's Uninstall remove?
Short answer: It finds the app's files in your Library — support files, caches, logs, preferences, saved state, its sandbox container, website data and cookies — and lists each one before moving them to the Trash.
It looks in the standard places macOS apps keep per-app files in your Library and lists what it finds for that app, for example:
- application support files and app scripts
- cached data and log files
- saved preferences and saved window state
- the app's sandbox container
- website data and cookies the app stored
It only includes items whose names clearly belong to that app, and you see every one, with its size, before anything moves to the Trash.