Freeing up space · Temporary files and Storage Studio's own footprint
How does Storage Studio know which app left temporary folders behind?
Short answer: It reads the name from the folders and checks whether an app of that name is installed. If none is, it shows the name as found rather than guessing — often a helper tool or a removed app.
It reads the name from the folders themselves, then asks your Mac whether an app of that name is installed. If one answers to it, the row carries that app's name.
If nothing answers, Storage Studio shows the name exactly as it found it rather than guessing at an owner — so an odd-looking name on a row usually means the folders were made by a helper tool, a command-line program, or an app you've since removed.