The extortionists received a ransom of more than $ 12,000. They are already winners. To reserve a database is of little use, because no one knows how long after penetration of the virus begins to work. He may sit inside your backups. Extortionists demanded payment in bitcoins and this means that once again touted the cryptocurrency. The whole world is talking not only about the virus, but the bitcoin is good.
Wherever and whatever the hackers do and evolve, people are not stupid to put the backups of their files and their wallets in the same OS they do their daily work. Me and everyone else will keep our backup of wallets in an external USB or HDD and will use as needed,(normally I don't need this as I have proactive protection of Avira Full Internet Security Suite but just in case). This way if you backup your files daily no hacker or ransomware can harm you. Maximum of harm they can do to you is a few hours of work, to reinstall OS and transfer files.