Questions about "Health:Error"

When I run the Benchmark Disk Routine, Disk Health reports an ERROR.

When I view the "Health Tab, I see

image.thumb.png.7f6e5579b3644262e017bdb05f5e139b.png

I don't know what this means (these mean). I don't know how to fix these, or what I may need to replace.

Any insights would be appreciated.

Thanks.