Re: Network shares etc?
A file systems which allow snapshots is an effective protection against malwares encrypting network shares files. Enable automatic snapshots every n minutes, and when you spot a ransomware, you can go back in time (after you cleared the infection, of course) faster than having to restore a backup.
Of course, it would be better to minimize the users having write access to any given share/folder, and maybe use a better way to share documents (i.e. something with auditing and versioning, for example), not easily accessible by a ransomware. A "free-for-all" approach is never sensible.