Privacy & safety · Keeping your files safe
Is it safe to use Storage Studio when my Desktop and Documents are in iCloud?
Short answer: Yes. For iCloud-synced folders the safe way to save space is making files online-only — they stay in iCloud and download when opened — rather than moving folders a sync service expects to manage.
Yes — and the right tool for synced folders is usually making files online-only rather than moving them. For iCloud Drive, Storage Studio can make downloaded files online-only, which frees space while the files stay in iCloud and download again when opened. It's never a delete.
Folders that a sync service manages are best left where that service expects them. See iCloud for the options.