As far as backups is concerned, should you ever be unlucky ro get caught by one of the now many file encrypting ransom malwares and prevent that from being a major problem, whatever size the hard drive is in your computer buy another of the same size as a spare, then a means to connect it via USB to your computer. (USB to SATA adapter, USB connected enclosure, or a full USB to hard drive docking station)
Once the spending is done, there are quite a few good and free to use software's that can completely clone your existing computers hard drive onto the one you just bought as a spare. (I have two spare drives for that purpose).
The good thing about a full clone is that it is an exact copy of your system, you can access and add new data at any time, though you cannot install new software. You need to install on the computer then make a fresh clone for that.
Keep the clone fully up to date regularly but always disconnect it after use so it is safe.
Should you then get caught with an encrypting malware, all you do is remove the now encrypted hard drive from the computer and fit the spare clone drive in its place. A few minutes with a screw driver is all it takes and you are back up and running.
For the clone making software I use the free version of Macrium Reflect which is one quite highly recommended by many computer technicians, though there are other software's available that will do the same thing.

As far as the encrypted drive, without actually accessing any part of it (To prevent cross infection), fully reformat the drive, it can then become the next clone.
Macrium Reflect will fully format the drive for you before transferring the new clone.