As someone mentioned, there was user account and password on the bottom case.
The case is nice and compact. LEDs were upside down, so I had to rotate the plastic cover (not a big deal). Installing the HDD is problematic due to the connectors being upside down (they could've been half the length if the connectors were oriented correctly!!). After starting the XCloud app, I was asked to provide email address to connect with the software and use advanced features. I tried 5 different addresses and none of them received an email with confirmation. I ended up disabling whole XCloud app and using it as a local storage only, so it's not working as expected at all.