Troubleshooting & messages · Moves and copies that didn't finish
What does "Some files changed while they were being copied" mean?
Short answer: An app was writing to the files during the copy, so it couldn't finish cleanly. Your original is untouched — quit the app using the folder and try again.
An app was writing to some of the files while Storage Studio copied them, so the copy couldn't finish cleanly. Your original is safe and untouched. Storage Studio only shows this message when the copy actually reported changing files — it doesn't guess.
### What to do 1. Quit the app that uses that folder (mail, messaging, browsers, editors and sync apps are common ones). 2. Try the move again. 3. Folders an app is always writing to are often better left in place.
See the folder is in use.