Seagate Personal Cloud

B2 loves to go to Comex and other electronic fair.  This time I tasked him to buy 4T Personal Cloud.  It is just plug and play.  I wonder about the security of the system.  I just turn on and it is ready to use.  I wonder if my neighbours or anyone one else can access the information in my Personal Cloud.  It is so much better than the first version, 1T I had bought for trial.  I have not setup it up with password or security yet. I am now borrowing videos from the library and putting them there.  I loves documentaries and they are free to borrow from our libraries.