Originally published on CodingCush .

To fix a full MacBook storage, you first need to see what is actually eating the space — and that is exactly what GrandPerspective shows you. This free macOS app scans your drive and draws every file as a rectangle: the bigger the file, the bigger the rectangle. In one picture you can spot the forgotten movie folder, the stack of old installers and the backup you no longer need, then delete them safely and watch the free space come back.

macOS tells you that your disk is full. GrandPerspective shows you why . Follow the eight steps below and you will go from "Storage Almost Full" warnings to a tidy drive in about fifteen minutes.

What Is GrandPerspective?

GrandPerspective is a small, free utility for macOS that displays disk usage as a "treemap". Each file becomes a coloured rectangle sized in proportion to how much space it takes, and files from the same folder sit together.…