Store the saves on a flash drive

Good day) are Faced with a problem: is firmware version 5.0 the console has never been online and only play on CDs. Passing Bloodborne I needed to keep the saves on a flash drive (to get platinum), BUT the console asks to be updated and trying to get into the Internet. How does she know about the new firmware despite the fact that it is pristine I don't know, and what is the logic of the query the Internet to save my saves are not in ps+,and at home, on my flash drive I also can not understand. But the point is, Komrad how to keep the saves I will use it again, beating the system update?
PS And screenshots saves