[Fyron]

Relying on the user making manual backups is not a sound strategy. There will be lapses, and Murphy's Law guarantees that any problems will occur during those lapses.

With sound partitioning strategies, malware infections are trivial to clear out. Give Windows its own 10 GB partition, install apps and save data on another partition. Even with a RAID, formatting the Windows partition and reinstalling to fix deep malware infection isn't that big of a deal.

RAID 0 is never an option. Don't even consider it.