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#11
For the future, you might want to think about making regular images with Macrium Reflect Free. That way, if a drive goes, you're just an image away from being back in business.
Backup and Restore with Macrium Reflect - Windows 10 Backup Restore Tutorials
Also, HDSentinel is great for watching your HDD health for you.
Hard Disk Sentinel - HDD health and temperature monitoring
p.s. Regular imaging will also help protect against infections and ransomware, whereas RAID will just copy problems and be no help at all in those scenarios.