Freeing up space · Where your space went
Why didn't Storage Studio warn me when a big download used lots of space?
Short answer: Storage Studio warns on the rate compared with your remaining room, not on size alone, so ordinary downloads and updates on a roomy drive stay quiet. You can still review any period yourself.
Because ordinary downloads, updates and builds aren't a problem on a drive with room to spare, and warning about them would train you to ignore the notices. Storage Studio weighs how fast space is going against how much you have left, so a large drop on a roomy drive stays quiet while a smaller one on a nearly full drive gets flagged.
When it does speak up, it's one notice per situation, never one per file. You can always look back at any period yourself with Where did my space go?