I made these diagrams to generally explain to a college class how file storage layers work on a drive and now when you delete/format the filesystem the file data remains. I couldn't find one online, so made one. What do you think? Any significant issues?
@climagic I miss inodes and link count in these pictures.
@bartjan The left side is the general case and the right side green box is a more specific case of each of the layers. I'll try to make that more obvious.