Does windows volume mirroring suck or is my drive dying?

I recently got a 14TB re-certified HDD from ServerPartDeals

I planned to set it up to mirror my current 6 year old 2TB HDD, and use the remaining space for easy to replace data like steam games.

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I set this up using Windows 10 Pro's Disk Management "Mirror volume"

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A day or so after setting this up, Disk Management said there was a "Redundancy failure", and reactivating the mirror did not work. So I had to start over. And then today it did it again. It also said "Drive errors"

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CrystalDiskInfo says theres no issues, and no reallocated sectors

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So this time I set it up without the mirror. Is it possible that the mirror was causing the errors? Or should I go ahead and return the drive?