Freeing up space · Storage Profile, charts and Home
What do Storage Studio's storage charts show?
Short answer: They show how full your built-in and fast drives have been over time, on one chart with separate scales. You can choose ranges, zoom, hover for exact values, and break down any period. History stays on your Mac.
They show what your built-in drive and your fast drive have been doing over time. Storage Studio records how full each one is and keeps that history on your Mac — nothing is uploaded.
Both drives share one chart, each with its own colour and scale, and you can pick a time range, drag to zoom, and hover for exact values. Underneath, Where did my space go? explains any period you choose. The charts live in the Storage Profile (Your storage over time). Full detail: Storage Charts manual.