Privacy & safety · What leaves your Mac
What does Storage Studio send when it checks for updates?
Short answer: A request to Storage Studio's server identifying the app version and your macOS version, at launch and about once a day, so it can offer a suitable update. No files, file names or accounts are included.
Only what any web request carries plus the app version: a request to Storage Studio's own server that identifies the app version and your macOS version, so it can tell you whether a newer version suits your Mac. It happens at launch and about once a day while the app runs.
Your files, file names and accounts aren't part of it. The details are in the Privacy Policy.