Not possible for a reader to know what apps you are running in your My Cloud Home (MCH) as you are the one who installed it. It could be multiple users on the MCH, or Plex users, it could be DLNA or SONOS, or Google drive, Dropbox, Elephant drive, mobile apps on iOS, Android, other sync tasks to the local access from Windows or macOS.
As this old thread showed, a MCH owner could always shut down the MCH remotely and turn it back on remotely with a smart switch and an app:
