5. Don’t use (only) direct disk access to backups I think all of that is lost if the cryptolocker just formats any volumes named Backup. The copy-on-write can

5. Don’t use (only) direct disk access to backups I think all of that is lost if the cryptolocker just formats any volumes named Backup. The copy-on-write can’t just be enforced by the filesystem. If this computer can permanently delete content on the backup system, then so can the locker.