Finding things in Finder · Finding what was moved
Does moving a folder also move hidden files I can't see in Finder?
Short answer: Yes. Hidden files use real space and move with their folder, and they're counted in Storage Studio's sizes. Press Command-Shift-Period in Finder to show or hide them yourself.
Yes. Hidden files take up real space and belong to the folder, so they move with it and are included in the sizes Storage Studio shows. That's one reason a size in Data Parking or What's Using Space can be larger than you'd expect from what Finder displays.
To see hidden files in Finder yourself, press ⌘⇧. (Command-Shift-Period) in a Finder window; press it again to hide them.