Privacy & safety · Permissions and access
Why does Storage Studio need Full Disk Access?
Short answer: macOS hides many folders from apps unless you grant Full Disk Access. Storage Studio needs it to see where your space is going and move folders without breaking them — all on your Mac, with nothing uploaded.
Without it, macOS hides many folders from every app — so Storage Studio couldn't see where your space is going or move folders without breaking them. Full Disk Access lets it measure protected folders and relocate files properly, all on your Mac.
It doesn't mean your files are sent anywhere. Storage Studio looks at sizes and dates to suggest what's safe to move, and your files stay on your Mac and the drives you choose.
You can skip it at first launch. Features that need it will show a short hint when you use them, and you can grant it later from Settings → Advanced → Permissions. See Getting started.