Privacy & safety · Keeping your files safe
How does Storage Studio make sure a move doesn't lose my files?
Short answer: It copies first, checks the copy against the original, and only then removes the original. A failed move cleans up the partial copy and never touches the original, and interrupted moves are finished or undone at next launch.
Every move copies first and only removes the original once the copy has been checked. If the copy is materially smaller than the source, the move fails and your original stays exactly where it was.
Other safeguards:
- Cleanup on failure — a move that fails partway removes the incomplete copy from the drive, never the original.
- Interruptions are resumed — if the app quits, your Mac shuts down or the drive is unplugged mid-copy, the next launch finishes the move cleanly or puts things back.
- A shortcut is left behind, so apps and Finder still find the files.
- Space-efficient files stay efficient on the drive instead of growing to full size.
See What's Using Space.