If you need a safe data management solution, protect your network with a Linux firewall and keep your data protected and safe using Google cloud, Dropbox cloud, and cloud HQ to synchronize your accounts. Use Linux workstations, they are fast and secure, not susceptible to virus or ransomware. If you are desperate to access windows only applications, then run them individually using VirtualBox from your Linux workstation in a closed subnet so that you don’t interfere with any files stored on your local network.
Why use 2 cloud solutions? I found that the google cloud is a productive and efficient storage solution for data that you can access from anywhere. It also has the ability to go back to a previous version of a document. If a document is deleted and you need to get it back you can also restore deleted files from trash. So why would you need to have Dropbox as well? If your Google account has been hacked or accidentally deleted. You have a backup.
Dropbox for me is my online backup. I use cloud HQ to synchronize the 2 accounts and I know that if I can’t access or find a particular file I can go to my Dropbox account and download it from there. If you never need it, Great, it has done its job.