Troubleshooting & messages · Moving, offloading and restoring apps
Why does Storage Studio warn that anything I haven't saved will be lost when quitting an app?
Short answer: Force quit ends the app instantly without letting it save, so unsaved work is lost. Use it only if the app has frozen — otherwise choose Ask it to quit.
To move a folder an app is using, the app has to close. Ask it to quit closes it normally, so it can prompt you to save. Force quit anyway ends the app immediately — it gets no chance to save or close its files — so anything unsaved is lost. That's why you're warned.
Use force quit only if the app has stopped responding. Otherwise, save your work and use Ask it to quit.